256355 has 16 divisors (see below), whose sum is σ = 345600. Its totient is φ = 180960.

The previous prime is 256349. The next prime is 256363. The reversal of 256355 is 553652.

It is a de Polignac number, because none of the positive numbers 2^k-256355 is a prime.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 3206 + ... + 3284.

It is an arithmetic number, because the mean of its divisors is an integer number (21600).

2²⁵⁶³⁵⁵ is an apocalyptic number.

256355 is a deficient number, since it is larger than the sum of its proper divisors (89245).

256355 is a wasteful number, since it uses less digits than its factorization.

256355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154.

The product of its digits is 4500, while the sum is 26.

The square root of 256355 is about 506.3151192686. The cubic root of 256355 is about 63.5253789063.

The spelling of 256355 in words is "two hundred fifty-six thousand, three hundred fifty-five".