265240265 has 4 divisors (see below), whose sum is σ = 318288324. Its totient is φ = 212192208.

The previous prime is 265240253. The next prime is 265240277. The reversal of 265240265 is 562042562.

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

It is an interprime number because it is at equal distance from previous prime (265240253) and next prime (265240277).

It can be written as a sum of positive squares in 2 ways, for example, as 140873161 + 124367104 = 11869^2 + 11152^2 .

It is a cyclic number.

It is not a de Polignac number, because 265240265 - 2⁶ = 265240201 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26524022 + ... + 26524031.

It is an arithmetic number, because the mean of its divisors is an integer number (79572081).

Almost surely, 2^265240265 is an apocalyptic number.

It is an amenable number.

265240265 is a deficient number, since it is larger than the sum of its proper divisors (53048059).

265240265 is an equidigital number, since it uses as much as digits as its factorization.

265240265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53048058.

The product of its (nonzero) digits is 28800, while the sum is 32.

The square root of 265240265 is about 16286.1986049538. The cubic root of 265240265 is about 642.5098909892.

The spelling of 265240265 in words is "two hundred sixty-five million, two hundred forty thousand, two hundred sixty-five".