255867 has 16 divisors (see below), whose sum is σ = 375840. Its totient is φ = 154112.

The previous prime is 255859. The next prime is 255869. The reversal of 255867 is 768552.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 255867 - 2³ = 255859 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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 255867.

It is not an unprimeable number, because it can be changed into a prime (255869) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1393 + ... + 1565.

It is an arithmetic number, because the mean of its divisors is an integer number (23490).

2²⁵⁵⁸⁶⁷ is an apocalyptic number.

255867 is a deficient number, since it is larger than the sum of its proper divisors (119973).

255867 is a wasteful number, since it uses less digits than its factorization.

255867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222.

The product of its digits is 16800, while the sum is 33.

The square root of 255867 is about 505.8329763865. The cubic root of 255867 is about 63.4850441145.

The spelling of 255867 in words is "two hundred fifty-five thousand, eight hundred sixty-seven".