1265336564 has 24 divisors (see below), whose sum is σ = 2230156488. Its totient is φ = 628162560.

The previous prime is 1265336561. The next prime is 1265336581. The reversal of 1265336564 is 4656335621.

It can be written as a sum of positive squares in 4 ways, for example, as 245172964 + 1020163600 = 15658^2 + 31940^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1265336561) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 493574 + ... + 496130.

It is an arithmetic number, because the mean of its divisors is an integer number (92923187).

Almost surely, 2^1265336564 is an apocalyptic number.

It is an amenable number.

1265336564 is a deficient number, since it is larger than the sum of its proper divisors (964819924).

1265336564 is a wasteful number, since it uses less digits than its factorization.

1265336564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3395 (or 3393 counting only the distinct ones).

The product of its digits is 388800, while the sum is 41.

The square root of 1265336564 is about 35571.5696027038. The cubic root of 1265336564 is about 1081.6049993003.

The spelling of 1265336564 in words is "one billion, two hundred sixty-five million, three hundred thirty-six thousand, five hundred sixty-four".