265965 has 32 divisors (see below), whose sum is σ = 518400. Its totient is φ = 113664.

The previous prime is 265961. The next prime is 265987. The reversal of 265965 is 569562.

It is not a de Polignac number, because 265965 - 2² = 265961 is a prime.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (265961) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1711 + ... + 1859.

It is an arithmetic number, because the mean of its divisors is an integer number (16200).

2²⁶⁵⁹⁶⁵ is an apocalyptic number.

It is an amenable number.

265965 is a deficient number, since it is larger than the sum of its proper divisors (252435).

265965 is a wasteful number, since it uses less digits than its factorization.

265965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181.

The product of its digits is 16200, while the sum is 33.

The square root of 265965 is about 515.7179461683. The cubic root of 265965 is about 64.3094550762.

The spelling of 265965 in words is "two hundred sixty-five thousand, nine hundred sixty-five".