265481 has 4 divisors (see below), whose sum is σ = 266772. Its totient is φ = 264192.

The previous prime is 265471. The next prime is 265483. The reversal of 265481 is 184562.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 259081 + 6400 = 509^2 + 80^2 .

It is a cyclic number.

It is not a de Polignac number, because 265481 - 2⁶ = 265417 is a prime.

It is a super-2 number, since 2×265481² = 140960322722, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 265481.

It is not an unprimeable number, because it can be changed into a prime (265483) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 260 + ... + 773.

It is an arithmetic number, because the mean of its divisors is an integer number (66693).

2²⁶⁵⁴⁸¹ is an apocalyptic number.

It is an amenable number.

265481 is a deficient number, since it is larger than the sum of its proper divisors (1291).

265481 is a wasteful number, since it uses less digits than its factorization.

265481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1290.

The product of its digits is 1920, while the sum is 26.

The square root of 265481 is about 515.2484837435. The cubic root of 265481 is about 64.2704215240.

The spelling of 265481 in words is "two hundred sixty-five thousand, four hundred eighty-one".