256504 has 8 divisors (see below), whose sum is σ = 480960. Its totient is φ = 128248.

The previous prime is 256499. The next prime is 256517. The reversal of 256504 is 405652.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

256504 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16024 + ... + 16039.

It is an arithmetic number, because the mean of its divisors is an integer number (60120).

2²⁵⁶⁵⁰⁴ is an apocalyptic number.

It is an amenable number.

256504 is a deficient number, since it is larger than the sum of its proper divisors (224456).

256504 is a wasteful number, since it uses less digits than its factorization.

256504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32069 (or 32065 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 256504 is about 506.4622394611. The cubic root of 256504 is about 63.5376840407.

The spelling of 256504 in words is "two hundred fifty-six thousand, five hundred four".