1257268456 has 32 divisors (see below), whose sum is σ = 2627424000. Its totient is φ = 560514816.

The previous prime is 1257268429. The next prime is 1257268469. The reversal of 1257268456 is 6548627521.

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, 240696 + ... + 245863.

It is an arithmetic number, because the mean of its divisors is an integer number (82107000).

Almost surely, 2^1257268456 is an apocalyptic number.

It is an amenable number.

1257268456 is an abundant number, since it is smaller than the sum of its proper divisors (1370155544).

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

1257268456 is a wasteful number, since it uses less digits than its factorization.

1257268456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 486601 (or 486597 counting only the distinct ones).

The product of its digits is 806400, while the sum is 46.

The square root of 1257268456 is about 35457.9815556385. The cubic root of 1257268456 is about 1079.3012329472.

The spelling of 1257268456 in words is "one billion, two hundred fifty-seven million, two hundred sixty-eight thousand, four hundred fifty-six".