867855 has 16 divisors (see below), whose sum is σ = 1419264. Its totient is φ = 452640.

The previous prime is 867829. The next prime is 867857. The reversal of 867855 is 558768.

It is a happy number.

It is not a de Polignac number, because 867855 - 2⁹ = 867343 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (867857) 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, 90 + ... + 1320.

It is an arithmetic number, because the mean of its divisors is an integer number (88704).

2⁸⁶⁷⁸⁵⁵ is an apocalyptic number.

867855 is a deficient number, since it is larger than the sum of its proper divisors (551409).

867855 is a wasteful number, since it uses less digits than its factorization.

867855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1286.

The product of its digits is 67200, while the sum is 39.

The square root of 867855 is about 931.5873550022. The cubic root of 867855 is about 95.3855064586.

The spelling of 867855 in words is "eight hundred sixty-seven thousand, eight hundred fifty-five".