265421164 has 12 divisors (see below), whose sum is σ = 464601088. Its totient is φ = 132678000.

The previous prime is 265421161. The next prime is 265421171. The reversal of 265421164 is 461124562.

It is a happy number.

It is a super-2 number, since 2×265421164² = 140896788598229792, which contains 22 as substring.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (265421161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28309 + ... + 36499.

Almost surely, 2^265421164 is an apocalyptic number.

It is an amenable number.

265421164 is a deficient number, since it is larger than the sum of its proper divisors (199179924).

265421164 is a wasteful number, since it uses less digits than its factorization.

265421164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16296 (or 16294 counting only the distinct ones).

The product of its digits is 11520, while the sum is 31.

The square root of 265421164 is about 16291.7514098393. The cubic root of 265421164 is about 642.6559258596.

The spelling of 265421164 in words is "two hundred sixty-five million, four hundred twenty-one thousand, one hundred sixty-four".