265120878 has 16 divisors (see below), whose sum is σ = 578445696. Its totient is φ = 80339640.

The previous prime is 265120853. The next prime is 265120949. The reversal of 265120878 is 878021562.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2008426 + ... + 2008557.

It is an arithmetic number, because the mean of its divisors is an integer number (36152856).

Almost surely, 2^265120878 is an apocalyptic number.

265120878 is an abundant number, since it is smaller than the sum of its proper divisors (313324818).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

265120878 is a wasteful number, since it uses less digits than its factorization.

265120878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4016999.

The product of its (nonzero) digits is 53760, while the sum is 39.

The square root of 265120878 is about 16282.5329110676. The cubic root of 265120878 is about 642.4134767185.

The spelling of 265120878 in words is "two hundred sixty-five million, one hundred twenty thousand, eight hundred seventy-eight".