265011265 has 4 divisors (see below), whose sum is σ = 318013524. Its totient is φ = 212009008.

The previous prime is 265011247. The next prime is 265011269. The reversal of 265011265 is 562110562.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 205520896 + 59490369 = 14336^2 + 7713^2 .

It is a cyclic number.

It is not a de Polignac number, because 265011265 - 2⁵ = 265011233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (265011269) 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, 26501122 + ... + 26501131.

It is an arithmetic number, because the mean of its divisors is an integer number (79503381).

Almost surely, 2^265011265 is an apocalyptic number.

It is an amenable number.

265011265 is a deficient number, since it is larger than the sum of its proper divisors (53002259).

265011265 is an equidigital number, since it uses as much as digits as its factorization.

265011265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53002258.

The product of its (nonzero) digits is 3600, while the sum is 28.

The square root of 265011265 is about 16279.1665941473. The cubic root of 265011265 is about 642.3249302214.

The spelling of 265011265 in words is "two hundred sixty-five million, eleven thousand, two hundred sixty-five".