265580 has 36 divisors (see below), whose sum is σ = 651168. Its totient is φ = 90720.

The previous prime is 265579. The next prime is 265607. The reversal of 265580 is 85562.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 845 + ... + 1115.

It is an arithmetic number, because the mean of its divisors is an integer number (18088).

2²⁶⁵⁵⁸⁰ is an apocalyptic number.

265580 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 265580, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (325584).

265580 is an abundant number, since it is smaller than the sum of its proper divisors (385588).

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

265580 is a wasteful number, since it uses less digits than its factorization.

265580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 294 (or 285 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 265580 is about 515.3445449406. The cubic root of 265580 is about 64.2784095168.

The spelling of 265580 in words is "two hundred sixty-five thousand, five hundred eighty".