265256121 has 32 divisors (see below), whose sum is σ = 396280192. Its totient is φ = 156764160.

The previous prime is 265256107. The next prime is 265256141. The reversal of 265256121 is 121652562.

It is not a de Polignac number, because 265256121 - 2²⁵ = 231701689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (265256141) 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, 101001 + ... + 103593.

It is an arithmetic number, because the mean of its divisors is an integer number (12383756).

Almost surely, 2^265256121 is an apocalyptic number.

It is an amenable number.

265256121 is a deficient number, since it is larger than the sum of its proper divisors (131024071).

265256121 is a wasteful number, since it uses less digits than its factorization.

265256121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2713.

The product of its digits is 7200, while the sum is 30.

The square root of 265256121 is about 16286.6853902198. The cubic root of 265256121 is about 642.5226937636.

The spelling of 265256121 in words is "two hundred sixty-five million, two hundred fifty-six thousand, one hundred twenty-one".