Number: 42

Facts about the number: 42 is the number of spots (or pips, circular patches or pits) on a pair of standard six-sided dice. 42 is the number of museums in Amsterdam (Netherlands has the highest concentration of museums in the world). 42 is the result given by the web search engines Google, Wolfram Alpha and Bing when the query "the answer to life the universe and everything" is entered as a search. 42 is the angle in degrees for which a rainbow appears or the critical angle. 42 is the number of laws of cricket. 42 is a perfect score on the USA Math Olympiad (USAMO) and International Mathematical Olympiad (IMO). 42 is the 5^{th} Catalan number. 42 is conjectured to be the scaling factor in the leading order term of the "sixth moment of the Riemann zeta function". 42 is the reciprocal of the sixth Bernoulli number. 42 is the third pentadecagonal number.
The number of digits in the number: \( n \): \( d = \lfloor \log_{10}(n) \rfloor + 1 \)	2
Sum of the digits: \( n \): \( S = \sum_{i=1}^{k} d_i \)	6
Reverse number: \( \text{Reverse}(n) = \sum_{i=1}^{k} d_i \cdot 10^{k-i} \)	0.023809523809524
Binary number system: \( n = \sum_{i=0}^{k-1} d_i \cdot 2^i \)	1001100000111011001001011111100111011000010111
Hexadecimal number system: \( n = \sum_{i=0}^{k-1} d_i \cdot 16^i \)	260ec97e7617
Parity of the number: \( \text{Parity}(n) = n \mod 2 \)	even
Simplicity of the number: \(\text{IsPrime}(n) = n > 1 \land \forall d \in [2, \sqrt{n}], n \mod d \neq 0\)	false
The square root: \(\sqrt{n} = n^{\frac{1}{2}}\)	6.4807406984079
The factorial of the number: \( n!=n \times (n-1) \times (n-2) \times \ldots \times 2 \times 1 \)	1.4050061177529E+51
The sign of the number: \(\text{sign}(n) = \begin{cases} 1, & \text{if } n>0 \ 0, & \text{if } n=0 \ -1, & \text{if } n<0 \end{cases}\)	+
The nearest multiple of 10: \(\text{10}(n) = 10 \times \left\lfloor \frac{n + 5}{10} \right\rfloor\)	0
The nearest multiple of 100: \(\text{100}(n) = 100 \times \left\lfloor \frac{n + 50}{100} \right\rfloor\)	0
Sine: \(\sin(x) = \sum_{n=0}^{\infty} \frac{(-1)^n x^{2n+1}}{(2n+1)!}\)	-0.91652154791563
Cosine: \(\cos(x) = \sum_{n=0}^{\infty} \frac{(-1)^n x^{2n}}{(2n)!}\)	-0.39998531498835
Tangent: \(\tan(x) = \sum_{n=0}^{\infty} \frac{(-1)^n 2^{2n} (2^{2n} - 1) B_{2n} x^{2n-1}}{(2n)!}\)	2.2913879924375
The square of the number: \(\text{square}(n) = n^2\)	1764
Cubic root: \(\text{}(n) = \sqrt[3]{n}\)	3.4760266448864
Natural logarithm: \(\ln(ab) = \ln(a) + \ln(b)\)	3.7376696182834
Common logarithm: \(\log_{10}(ab) = \log_{10}(a) + \log_{10}(b)\)	1.6232492903979
All divisors of a number: \( D(n) = \{ d \in \mathbb{Z}^+ : n \mod d = 0 \} \)	1, 2, 3, 6, 7, 14, 21, 42
Base64:	NDEuODQ0OTUxOTA1ODE1
SHA1:	d73db66d5ce4bcad533593baed028d96bf03c31d
MD5:	ab9217c85c40a4ebe50faadffc0f409d
Converts a number to a Roman representation:	XLII
Converting the number of seconds to days, hours, minutes and seconds:	days: 0, hours: 0, minutes: 0, seconds: 42.
Converts a number to a date in UNIX time format:
	Chinese:	1970 月 1 星期四
	Spanish:	1970 Enero 1 Jueves
	English:	1970 January 1 Thursday
	Hindi:	1970 जनवरी 1 गुरुवार
	Arab:	1970 يناير 1 الخميس
	Bengal:	1970 জানুয়ারী 1 বৃহস্পতিবার
	Portuguese:	1970 Janeiro 1 Quinta-feira
	Russian:	1970 Январь 1 Четверг
	Japanese:	1970 一月 1 木曜日
	Lahnda:	1970 جنوری 1 جمعرات
	Marathi:	1970 जानेवारी 1 गुरुवार
	Telugu:	1970 జనవరి 1 గురువారం
	Malay:	1970 Januari 1 Khamis
	Turkish:	1970 Ocak 1 Perşembe
	Korean:	1970 1월 1 목요일
	French:	1970 Janvier 1 Jeudi
	German:	1970 Januar 1 Donnerstag
	Vietnamese:	1970 Tháng Một 1 Thứ năm
	Tamil:	1970 ஜனவரி 1 வியாழக்கிழமை
	Urdu:	1970 جنوری 1 جمعرات
	Javanese:	1970 Januari 1 Kemis
	Italian:	1970 Gennaio 1 Giovedì
	Persian:	1970 ژانویه 1 پنج‌شنبه
	Gujaratis:	1970 જાન્યુઆરી 1 ગુરુવાર
Length:
	42 kilometers = 42,000.00 meters
	42 miles = 67,592.28 meters
	42 feet = 12.80 meters
	42 inches = 1.07 meters
	42 yards = 38.40 meters
	42 meters = 0.04 kilometers
	42 meters = 0.03 miles
	42 meters = 137.80 feet
	42 meters = 1,653.54 inches
	42 meters = 45.93 yards
Weight:
	42 pounds = 19.05 kilograms
	42 grams = 0.04 kilograms
	42 ounces = 1.19 kilograms
	42 tons = 38,101.77 kilograms
	42 kilograms = 92.59 pounds
	42 kilograms = 42,000.00 grams
	42 kilograms = 1,481.51 ounces
	42 kilograms = 0.05 tons
Volume:
	42 gallons = 158.99 liters
	42 milliliters = 0.04 liters
	42 cubic meters = 42,000.00 liters
	42 liters = 11.10 gallons
	42 liters = 42,000.00 milliliters
	42 liters = 0.04 cubic meters
Area:
	42 acres = 169,968.12 square meters
	42 hectares = 420,000.00 square meters
	42 square feet = 3.90 square meters
	42 square inches = 0.03 square meters
	42 square meters = 0.01 acres
	42 square meters = 0.00 hectares
	42 square meters = 452.08 square feet
	42 square meters = 65,100.13 square inches
Temperature:
	42 celsius = 107.60 fahrenheit
	42 celsius = 315.15 kelvin
	42 fahrenheit = 5.56 celsius
	42 fahrenheit = 278.71 kelvin
	42 kelvin = -231.15 celsius
	42 kelvin = -384.07 fahrenheit
Time:
	42 seconds = 0.70 minutes
	42 seconds = 0.01 hours
	42 seconds = 0.00 days
	42 minutes = 2,520.00 seconds
	42 minutes = 0.70 hours
	42 minutes = 0.03 days
	42 hours = 151,200.00 seconds
	42 hours = 2,520.00 minutes
	42 hours = 1.75 days
	42 days = 3,628,800.00 seconds
	42 days = 60,480.00 minutes
	42 days = 1,008.00 hours
Energy:
	42 joules = 10.04 calories
	42 joules = 0.04 kilojoules
	42 joules = 0.01 watt hours
	42 calories = 175.73 joules
	42 calories = 0.18 kilojoules
	42 kilojoules = 42,000.00 joules
	42 kilojoules = 10,038.25 calories
	42 watt hours = 151,200.00 joules
	42 watt hours = 151.20 kilojoules
Information:
	42 bytes = 0.04 kilobytes
	42 kilobytes = 43,008.00 bytes
	42 kilobytes = 0.04 megabytes
	42 megabytes = 43,008.00 kilobytes
	42 megabytes = 0.04 gigabytes
	42 gigabytes = 43,008.00 megabytes
	42 gigabytes = 0.04 terabytes
	42 terabytes = 43,008.00 gigabytes