1557125115 has 64 divisors (see below), whose sum is σ = 3246759936. Its totient is φ = 618412032.

The previous prime is 1557125083. The next prime is 1557125123. The reversal of 1557125115 is 5115217551.

It is not a de Polignac number, because 1557125115 - 2⁵ = 1557125083 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 10347 + ... + 56756.

It is an arithmetic number, because the mean of its divisors is an integer number (50730624).

Almost surely, 2^1557125115 is an apocalyptic number.

1557125115 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1557125115 is an abundant number, since it is smaller than the sum of its proper divisors (1689634821).

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

1557125115 is a wasteful number, since it uses less digits than its factorization.

1557125115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67148.

The product of its digits is 8750, while the sum is 33.

The square root of 1557125115 is about 39460.4246682673. The cubic root of 1557125115 is about 1159.0651194737.

The spelling of 1557125115 in words is "one billion, five hundred fifty-seven million, one hundred twenty-five thousand, one hundred fifteen".