256862 has 4 divisors (see below), whose sum is σ = 385296. Its totient is φ = 128430.

The previous prime is 256831. The next prime is 256873. The reversal of 256862 is 268652.

It is a semiprime because it is the product of two 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 256862.

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 as a sum of consecutive naturals, namely, 64214 + ... + 64217.

It is an arithmetic number, because the mean of its divisors is an integer number (96324).

2²⁵⁶⁸⁶² is an apocalyptic number.

256862 is a deficient number, since it is larger than the sum of its proper divisors (128434).

256862 is a wasteful number, since it uses less digits than its factorization.

256862 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128433.

The product of its digits is 5760, while the sum is 29.

The square root of 256862 is about 506.8155483014. The cubic root of 256862 is about 63.5672299305.

The spelling of 256862 in words is "two hundred fifty-six thousand, eight hundred sixty-two".