265864 has 16 divisors (see below), whose sum is σ = 504000. Its totient is φ = 131472.

The previous prime is 265861. The next prime is 265871. The reversal of 265864 is 468562.

It is not an unprimeable number, because it can be changed into a prime (265861) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1237 + ... + 1435.

It is an arithmetic number, because the mean of its divisors is an integer number (31500).

2²⁶⁵⁸⁶⁴ is an apocalyptic number.

It is an amenable number.

265864 is a deficient number, since it is larger than the sum of its proper divisors (238136).

265864 is a wasteful number, since it uses less digits than its factorization.

265864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 372 (or 368 counting only the distinct ones).

The product of its digits is 11520, while the sum is 31.

The square root of 265864 is about 515.6200151274. The cubic root of 265864 is about 64.3013135572.

The spelling of 265864 in words is "two hundred sixty-five thousand, eight hundred sixty-four".