1265882564 has 12 divisors (see below), whose sum is σ = 2215775100. Its totient is φ = 632803968.

The previous prime is 1265882549. The next prime is 1265882593. The reversal of 1265882564 is 4652885621.

It can be written as a sum of positive squares in 2 ways, for example, as 457617664 + 808264900 = 21392^2 + 28430^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11969 + ... + 51720.

It is an arithmetic number, because the mean of its divisors is an integer number (184647925).

Almost surely, 2^1265882564 is an apocalyptic number.

It is an amenable number.

1265882564 is a deficient number, since it is larger than the sum of its proper divisors (949892536).

1265882564 is a wasteful number, since it uses less digits than its factorization.

1265882564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68662 (or 68660 counting only the distinct ones).

The product of its digits is 921600, while the sum is 47.

The square root of 1265882564 is about 35579.2434433336. The cubic root of 1265882564 is about 1081.7605498534.

The spelling of 1265882564 in words is "one billion, two hundred sixty-five million, eight hundred eighty-two thousand, five hundred sixty-four".