1315857456 has 30 divisors (see below), whose sum is σ = 3682573700. Its totient is φ = 438619104.

The previous prime is 1315857437. The next prime is 1315857457. The reversal of 1315857456 is 6547585131.

1315857456 is a `hidden beast` number, since 13 + 1 + 585 + 7 + 4 + 56 = 666.

It is not an unprimeable number, because it can be changed into a prime (1315857457) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4568806 + ... + 4569093.

Almost surely, 2^1315857456 is an apocalyptic number.

1315857456 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1315857456 is an abundant number, since it is smaller than the sum of its proper divisors (2366716244).

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

1315857456 is a wasteful number, since it uses less digits than its factorization.

1315857456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9137913 (or 9137904 counting only the distinct ones).

The product of its digits is 504000, while the sum is 45.

The square root of 1315857456 is about 36274.7495649522. The cubic root of 1315857456 is about 1095.8125800610.

The spelling of 1315857456 in words is "one billion, three hundred fifteen million, eight hundred fifty-seven thousand, four hundred fifty-six".