256242 has 16 divisors (see below), whose sum is σ = 585792. Its totient is φ = 73200.

The previous prime is 256219. The next prime is 256279. The reversal of 256242 is 242652.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 256242.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3009 + ... + 3092.

It is an arithmetic number, because the mean of its divisors is an integer number (36612).

2²⁵⁶²⁴² is an apocalyptic number.

256242 is an abundant number, since it is smaller than the sum of its proper divisors (329550).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

256242 is a wasteful number, since it uses less digits than its factorization.

256242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6113.

The product of its digits is 960, while the sum is 21.

The square root of 256242 is about 506.2035163845. The cubic root of 256242 is about 63.5160436449.

Adding to 256242 its reverse (242652), we get a palindrome (498894).

The spelling of 256242 in words is "two hundred fifty-six thousand, two hundred forty-two".