256502 has 8 divisors (see below), whose sum is σ = 386976. Its totient is φ = 127512.

The previous prime is 256499. The next prime is 256517. The reversal of 256502 is 205652.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 256502.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 323 + ... + 785.

It is an arithmetic number, because the mean of its divisors is an integer number (48372).

2²⁵⁶⁵⁰² is an apocalyptic number.

256502 is a deficient number, since it is larger than the sum of its proper divisors (130474).

256502 is a wasteful number, since it uses less digits than its factorization.

256502 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 742.

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 256502 is about 506.4602649764. The cubic root of 256502 is about 63.5375189027.

It can be divided in two parts, 25650 and 2, that added together give a palindrome (25652).

The spelling of 256502 in words is "two hundred fifty-six thousand, five hundred two".