1297736256 has 28 divisors (see below), whose sum is σ = 3433594352. Its totient is φ = 432578688.

The previous prime is 1297736249. The next prime is 1297736269. The reversal of 1297736256 is 6526377921.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3379330 + ... + 3379713.

Almost surely, 2^1297736256 is an apocalyptic number.

1297736256 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1297736256 is an abundant number, since it is smaller than the sum of its proper divisors (2135858096).

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

1297736256 is an equidigital number, since it uses as much as digits as its factorization.

1297736256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6759058 (or 6759048 counting only the distinct ones).

The product of its digits is 952560, while the sum is 48.

The square root of 1297736256 is about 36024.1065954452. The cubic root of 1297736256 is about 1090.7590190734.

The spelling of 1297736256 in words is "one billion, two hundred ninety-seven million, seven hundred thirty-six thousand, two hundred fifty-six".