265421165 has 16 divisors (see below), whose sum is σ = 344334720. Its totient is φ = 195721920.

The previous prime is 265421161. The next prime is 265421171. The reversal of 265421165 is 561124562.

265421165 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 265421165 - 2² = 265421161 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (265421161) 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, 34241 + ... + 41270.

It is an arithmetic number, because the mean of its divisors is an integer number (21520920).

Almost surely, 2^265421165 is an apocalyptic number.

It is an amenable number.

265421165 is a deficient number, since it is larger than the sum of its proper divisors (78913555).

265421165 is a wasteful number, since it uses less digits than its factorization.

265421165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75572.

The product of its digits is 14400, while the sum is 32.

The square root of 265421165 is about 16291.7514405297. The cubic root of 265421165 is about 642.6559266667.

The spelling of 265421165 in words is "two hundred sixty-five million, four hundred twenty-one thousand, one hundred sixty-five".