257120715 has 16 divisors (see below), whose sum is σ = 413860608. Its totient is φ = 136308576.

The previous prime is 257120701. The next prime is 257120783. The reversal of 257120715 is 517021752.

It is not a de Polignac number, because 257120715 - 2⁵ = 257120683 is a prime.

It is a super-2 number, since 2×257120715² = 132222124164222450, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48817 + ... + 53826.

It is an arithmetic number, because the mean of its divisors is an integer number (25866288).

Almost surely, 2^257120715 is an apocalyptic number.

257120715 is a deficient number, since it is larger than the sum of its proper divisors (156739893).

257120715 is a wasteful number, since it uses less digits than its factorization.

257120715 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102818.

The product of its (nonzero) digits is 4900, while the sum is 30.

The square root of 257120715 is about 16034.9840972793. The cubic root of 257120715 is about 635.8856470368.

The spelling of 257120715 in words is "two hundred fifty-seven million, one hundred twenty thousand, seven hundred fifteen".