265540 has 48 divisors (see below), whose sum is σ = 653184. Its totient is φ = 89600.

The previous prime is 265513. The next prime is 265541. The reversal of 265540 is 45562.

It is a super-2 number, since 2×265540² = 141022983200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is not an unprimeable number, because it can be changed into a prime (265541) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3705 + ... + 3775.

It is an arithmetic number, because the mean of its divisors is an integer number (13608).

2²⁶⁵⁵⁴⁰ is an apocalyptic number.

265540 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 265540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (326592).

265540 is an abundant number, since it is smaller than the sum of its proper divisors (387644).

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

265540 is a wasteful number, since it uses less digits than its factorization.

265540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108 (or 106 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 265540 is about 515.3057344917. The cubic root of 265540 is about 64.2751822840.

Adding to 265540 its sum of digits (22), we get a palindrome (265562).

The spelling of 265540 in words is "two hundred sixty-five thousand, five hundred forty".