1557245115 has 32 divisors (see below), whose sum is σ = 2815372800. Its totient is φ = 816449760.

The previous prime is 1557245093. The next prime is 1557245143. The reversal of 1557245115 is 5115427551.

It is not a de Polignac number, because 1557245115 - 2⁵ = 1557245083 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1557245115.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 89791 + ... + 105720.

It is an arithmetic number, because the mean of its divisors is an integer number (87980400).

Almost surely, 2^1557245115 is an apocalyptic number.

1557245115 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1557245115 is a deficient number, since it is larger than the sum of its proper divisors (1258127685).

1557245115 is a wasteful number, since it uses less digits than its factorization.

1557245115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195584 (or 195578 counting only the distinct ones).

The product of its digits is 35000, while the sum is 36.

The square root of 1557245115 is about 39461.9451497262. The cubic root of 1557245115 is about 1159.0948931980.

The spelling of 1557245115 in words is "one billion, five hundred fifty-seven million, two hundred forty-five thousand, one hundred fifteen".