256510 has 16 divisors (see below), whose sum is σ = 467856. Its totient is φ = 101248.

The previous prime is 256499. The next prime is 256517. The reversal of 256510 is 15652.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256517) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1017 + ... + 1243.

It is an arithmetic number, because the mean of its divisors is an integer number (29241).

2²⁵⁶⁵¹⁰ is an apocalyptic number.

256510 is a deficient number, since it is larger than the sum of its proper divisors (211346).

256510 is a wasteful number, since it uses less digits than its factorization.

256510 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 347.

The product of its (nonzero) digits is 300, while the sum is 19.

The square root of 256510 is about 506.4681628691. The cubic root of 256510 is about 63.5381794497.

The spelling of 256510 in words is "two hundred fifty-six thousand, five hundred ten".