1277255764 has 48 divisors (see below), whose sum is σ = 2405652480. Its totient is φ = 591252480.

The previous prime is 1277255743. The next prime is 1277255783. The reversal of 1277255764 is 4675527721.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1130752 + ... + 1131880.

It is an arithmetic number, because the mean of its divisors is an integer number (50117760).

Almost surely, 2^1277255764 is an apocalyptic number.

It is an amenable number.

1277255764 is a deficient number, since it is larger than the sum of its proper divisors (1128396716).

1277255764 is a wasteful number, since it uses less digits than its factorization.

1277255764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1408 (or 1406 counting only the distinct ones).

The product of its digits is 823200, while the sum is 46.

The square root of 1277255764 is about 35738.7151979474. The cubic root of 1277255764 is about 1084.9905536918.

The spelling of 1277255764 in words is "one billion, two hundred seventy-seven million, two hundred fifty-five thousand, seven hundred sixty-four".