265820 has 12 divisors (see below), whose sum is σ = 558264. Its totient is φ = 106320.

The previous prime is 265819. The next prime is 265831. The reversal of 265820 is 28562.

It is a happy number.

It is a hoax number, since the sum of its digits (23) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6626 + ... + 6665.

It is an arithmetic number, because the mean of its divisors is an integer number (46522).

2²⁶⁵⁸²⁰ is an apocalyptic number.

265820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

265820 is an abundant number, since it is smaller than the sum of its proper divisors (292444).

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

265820 is a wasteful number, since it uses less digits than its factorization.

265820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13300 (or 13298 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 265820 is about 515.5773462828. The cubic root of 265820 is about 64.2977661120.

The spelling of 265820 in words is "two hundred sixty-five thousand, eight hundred twenty".