252430857 has 32 divisors (see below), whose sum is σ = 430560000. Its totient is φ = 143178624.

The previous prime is 252430853. The next prime is 252430873. The reversal of 252430857 is 758034252.

It is not a de Polignac number, because 252430857 - 2² = 252430853 is a prime.

It is not an unprimeable number, because it can be changed into a prime (252430853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21019 + ... + 30767.

It is an arithmetic number, because the mean of its divisors is an integer number (13455000).

Almost surely, 2^252430857 is an apocalyptic number.

252430857 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

252430857 is a deficient number, since it is larger than the sum of its proper divisors (178129143).

252430857 is a wasteful number, since it uses less digits than its factorization.

252430857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9902 (or 9896 counting only the distinct ones).

The product of its (nonzero) digits is 67200, while the sum is 36.

The square root of 252430857 is about 15888.0727906188. The cubic root of 252430857 is about 631.9957346625.

The spelling of 252430857 in words is "two hundred fifty-two million, four hundred thirty thousand, eight hundred fifty-seven".