# 42 number

42 is the natural number following 41 and followed by 43.

 Template:Numbers 40s Cardinal forty-two Ordinal 42nd (forty-second) Factorization 2 × 3 × 7 Divisors 2, 3, 6, 7, 14, 21 Roman numeral XLII Binary 101010 Hexadecimal 2A IEEE Float 42.0 = 42280000 hexadecimal Hebrew מב (Mem Bet)

## In mathematics

This composite number's factorization makes it a sphenic number. It is also the third 15-gonal number, a Catalan number, a meandric number, an open meandric number, a Harshad number and a self number. It is bracketed by twin primes.

## In pop culture

The number 42 is The Ultimate Answer to Life, the Universe and Everything, according to Douglas Adams' book The Hitchhiker's Guide to the Galaxy. Numerous others have parodied the already facetiously portrayed mysticism of 42 and it is speculated that the following references are derived from Adams' original use:

It is also interesting to note that 47 shares 42's status as a cult figure integer, and tongue-n-cheek legends concerning these numbers are numerous.

## In other fields

Forty-two is also: