265970865 has 16 divisors (see below), whose sum is σ = 450586368. Its totient is φ = 133506816.

The previous prime is 265970857. The next prime is 265970891. The reversal of 265970865 is 568079562.

It is a happy number.

It is not a de Polignac number, because 265970865 - 2³ = 265970857 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 521257 + ... + 521766.

It is an arithmetic number, because the mean of its divisors is an integer number (28161648).

Almost surely, 2^265970865 is an apocalyptic number.

It is an amenable number.

265970865 is a deficient number, since it is larger than the sum of its proper divisors (184615503).

265970865 is a wasteful number, since it uses less digits than its factorization.

265970865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1043048.

The product of its (nonzero) digits is 907200, while the sum is 48.

The square root of 265970865 is about 16308.6132151081. The cubic root of 265970865 is about 643.0992778526.

The spelling of 265970865 in words is "two hundred sixty-five million, nine hundred seventy thousand, eight hundred sixty-five".