1297815256 has 32 divisors (see below), whose sum is σ = 2523973680. Its totient is φ = 625104000.

The previous prime is 1297815229. The next prime is 1297815263. The reversal of 1297815256 is 6525187921.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8191 + ... + 51601.

Almost surely, 2^1297815256 is an apocalyptic number.

It is an amenable number.

1297815256 is a deficient number, since it is larger than the sum of its proper divisors (1226158424).

1297815256 is a wasteful number, since it uses less digits than its factorization.

1297815256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43555 (or 43551 counting only the distinct ones).

The product of its digits is 302400, while the sum is 46.

The square root of 1297815256 is about 36025.2030667420. The cubic root of 1297815256 is about 1090.7811520282.

The spelling of 1297815256 in words is "one billion, two hundred ninety-seven million, eight hundred fifteen thousand, two hundred fifty-six".