42 (number) facts for kids



Cardinal  fortytwo  
Ordinal  42nd (fortysecond) 

Factorization  2 · 3 · 7  
Roman numeral  XLII  
Binary  101010_{2}  
Ternary  1120_{3}  
Quaternary  222_{4}  
Quinary  132_{5}  
Senary  110_{6}  
Octal  52_{8}  
Duodecimal  36_{12}  
Hexadecimal  2A_{16}  
Vigesimal  22_{20}  
Base 36  16_{36} 
Fortytwo is a number. It comes between fortyone and fortythree, and is an even number. It is divisible by 1, 2, 3, 6, 7, 14, 21, and 42.
42 is an extremely interesting number to mathematicians, because of its many features. For example:
 It is the product of two consecutive integers (6 and 7), making it a pronic number.
 It is the second sphenic number, the product of three distinct prime numbers.
 It is an abundant number, the sum of its proper divisors is greater than the number itself.
There are at least a dozen more features of interest to number theory enthusiasts.
Appearance in literature
"42" is the "Answer to the Ultimate Question of Life, the Universe, and Everything" in Douglas Adams' The Hitchhiker's Guide to the Galaxy books.
The number makes regular appearances in Lewis Carroll's writings, such as in The Hunting of the Snark. Rule Fortytwo in Alice's Adventures in Wonderland is "All persons more than a mile high to leave the court". Charles Dodgson was a mathematician.
Images for kids

Jackie Robinson in his nowretired number 42 jersey