265564 has 12 divisors (see below), whose sum is σ = 500584. Its totient is φ = 122544.

The previous prime is 265561. The next prime is 265567. The reversal of 265564 is 465562.

It is an interprime number because it is at equal distance from previous prime (265561) and next prime (265567).

It is an Ulam number.

It is a d-powerful number, because it can be written as 2⁷ + 6 + 5³ + 5⁵ + 6² + 4⁹ .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (265561) 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, 2502 + ... + 2605.

2²⁶⁵⁵⁶⁴ is an apocalyptic number.

It is an amenable number.

265564 is a deficient number, since it is larger than the sum of its proper divisors (235020).

265564 is a wasteful number, since it uses less digits than its factorization.

265564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5124 (or 5122 counting only the distinct ones).

The product of its digits is 7200, while the sum is 28.

The square root of 265564 is about 515.3290211118. The cubic root of 265564 is about 64.2771186626.

The spelling of 265564 in words is "two hundred sixty-five thousand, five hundred sixty-four".