264385265 has 4 divisors (see below), whose sum is σ = 317262324. Its totient is φ = 211508208.

The previous prime is 264385249. The next prime is 264385273. The reversal of 264385265 is 562583462.

It is a happy number.

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 158357056 + 106028209 = 12584^2 + 10297^2 .

It is a cyclic number.

It is not a de Polignac number, because 264385265 - 2⁴ = 264385249 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26438522 + ... + 26438531.

It is an arithmetic number, because the mean of its divisors is an integer number (79315581).

Almost surely, 2^264385265 is an apocalyptic number.

It is an amenable number.

264385265 is a deficient number, since it is larger than the sum of its proper divisors (52877059).

264385265 is an equidigital number, since it uses as much as digits as its factorization.

264385265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52877058.

The product of its digits is 345600, while the sum is 41.

The square root of 264385265 is about 16259.9281978734. The cubic root of 264385265 is about 641.8187725837.

The spelling of 264385265 in words is "two hundred sixty-four million, three hundred eighty-five thousand, two hundred sixty-five".