1256457812974 has 32 divisors (see below), whose sum is σ = 2319700662720. Its totient is φ = 497041754112.

The previous prime is 1256457812969. The next prime is 1256457813011. The reversal of 1256457812974 is 4792187546521.

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, 5443212 + ... + 5669344.

It is an arithmetic number, because the mean of its divisors is an integer number (72490645710).

Almost surely, 2^{1256457812974} is an apocalyptic number.

1256457812974 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

1256457812974 is a deficient number, since it is larger than the sum of its proper divisors (1063242849746).

1256457812974 is a wasteful number, since it uses less digits than its factorization.

1256457812974 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256684.

The product of its digits is 33868800, while the sum is 61.

The spelling of 1256457812974 in words is "one trillion, two hundred fifty-six billion, four hundred fifty-seven million, eight hundred twelve thousand, nine hundred seventy-four".