242 (number)

241 242 243
Cardinal two hundred forty-two
Ordinal 242nd
(two hundred and forty-second)
Factorization 2 × 112
Roman numeral CCXLII
Binary 111100102
Ternary 222223
Quaternary 33024
Quinary 14325
Senary 10426
Octal 3628
Duodecimal 18212
Hexadecimal F216
Vigesimal C220
Base 36 6Q36

242 is the natural number following 241 and preceding 243.

In mathematics

242 is the smallest integer to start a run of four consecutive integers with the same number of divisors.[1][2]

242 is a nontotient since there is no integer with 242 coprimes below it.

242 is a palindrome.

In other fields

242 is also:

References

  1. R. K. Guy Unsolved Problems in Number Theory, section B18.
  2. D. Wells, The Penguin Dictionary of Curious and Interesting Numbers, Penguin Books, NY, 1986: 147, 176.