1276265264 has 40 divisors (see below), whose sum is σ = 2606976000. Its totient is φ = 603602496.

The previous prime is 1276265231. The next prime is 1276265267. The reversal of 1276265264 is 4625626721.

It is not an unprimeable number, because it can be changed into a prime (1276265267) 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, 215657 + ... + 221495.

It is an arithmetic number, because the mean of its divisors is an integer number (65174400).

Almost surely, 2^1276265264 is an apocalyptic number.

It is an amenable number.

1276265264 is an abundant number, since it is smaller than the sum of its proper divisors (1330710736).

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

1276265264 is a wasteful number, since it uses less digits than its factorization.

1276265264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6585 (or 6579 counting only the distinct ones).

The product of its digits is 241920, while the sum is 41.

The square root of 1276265264 is about 35724.8549892088. The cubic root of 1276265264 is about 1084.7100144566.

The spelling of 1276265264 in words is "one billion, two hundred seventy-six million, two hundred sixty-five thousand, two hundred sixty-four".