865916 has 12 divisors (see below), whose sum is σ = 1537200. Its totient is φ = 426720.

The previous prime is 865889. The next prime is 865933. The reversal of 865916 is 619568.

It is a congruent number.

It is an unprimeable number.

865916 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1241 + ... + 1808.

It is an arithmetic number, because the mean of its divisors is an integer number (128100).

2⁸⁶⁵⁹¹⁶ is an apocalyptic number.

It is an amenable number.

865916 is a deficient number, since it is larger than the sum of its proper divisors (671284).

865916 is a wasteful number, since it uses less digits than its factorization.

865916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3124 (or 3122 counting only the distinct ones).

The product of its digits is 12960, while the sum is 35.

The square root of 865916 is about 930.5460762370. The cubic root of 865916 is about 95.3144153158.

The spelling of 865916 in words is "eight hundred sixty-five thousand, nine hundred sixteen".