265530 has 32 divisors (see below), whose sum is σ = 653184. Its totient is φ = 69056.

The previous prime is 265513. The next prime is 265541. The reversal of 265530 is 35562.

It is a junction number, because it is equal to n+sod(n) for n = 265497 and 265506.

It is a congruent number.

It is an unprimeable number.

265530 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1507 + ... + 1673.

It is an arithmetic number, because the mean of its divisors is an integer number (20412).

2²⁶⁵⁵³⁰ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 265530, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (326592).

265530 is an abundant number, since it is smaller than the sum of its proper divisors (387654).

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

265530 is a wasteful number, since it uses less digits than its factorization.

265530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 230.

The product of its (nonzero) digits is 900, while the sum is 21.

The square root of 265530 is about 515.2960314227. The cubic root of 265530 is about 64.2743754252.

Multiplying 265530 by its sum of digits (21), we get a triangular number (5576130 = T₃₃₃₉).

The spelling of 265530 in words is "two hundred sixty-five thousand, five hundred thirty".