265506 has 32 divisors (see below), whose sum is σ = 596160. Its totient is φ = 78336.

The previous prime is 265493. The next prime is 265511. The reversal of 265506 is 605562.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1870 + ... + 2006.

It is an arithmetic number, because the mean of its divisors is an integer number (18630).

2²⁶⁵⁵⁰⁶ is an apocalyptic number.

265506 is an abundant number, since it is smaller than the sum of its proper divisors (330654).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

265506 is a wasteful number, since it uses less digits than its factorization.

265506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178.

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 265506 is about 515.2727433117. The cubic root of 265506 is about 64.2724388813.

The spelling of 265506 in words is "two hundred sixty-five thousand, five hundred six".