1265879912 has 16 divisors (see below), whose sum is σ = 2589300000. Its totient is φ = 575399920.

The previous prime is 1265879903. The next prime is 1265879917. The reversal of 1265879912 is 2199785621.

It is not an unprimeable number, because it can be changed into a prime (1265879917) by changing a digit.

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, 7192412 + ... + 7192587.

It is an arithmetic number, because the mean of its divisors is an integer number (161831250).

Almost surely, 2^1265879912 is an apocalyptic number.

It is an amenable number.

1265879912 is an abundant number, since it is smaller than the sum of its proper divisors (1323420088).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1265879912 is a wasteful number, since it uses less digits than its factorization.

1265879912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14385016 (or 14385012 counting only the distinct ones).

The product of its digits is 544320, while the sum is 50.

The square root of 1265879912 is about 35579.2061743935. The cubic root of 1265879912 is about 1081.7597944303.

The spelling of 1265879912 in words is "one billion, two hundred sixty-five million, eight hundred seventy-nine thousand, nine hundred twelve".