257499117 has 24 divisors (see below), whose sum is σ = 382663008. Its totient is φ = 166788000.

The previous prime is 257499083. The next prime is 257499139. The reversal of 257499117 is 711994752.

It is not a de Polignac number, because 257499117 - 2⁸ = 257498861 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257499167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 42742 + ... + 48392.

It is an arithmetic number, because the mean of its divisors is an integer number (15944292).

Almost surely, 2^257499117 is an apocalyptic number.

It is an amenable number.

257499117 is a deficient number, since it is larger than the sum of its proper divisors (125163891).

257499117 is a wasteful number, since it uses less digits than its factorization.

257499117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5801 (or 5798 counting only the distinct ones).

The product of its digits is 158760, while the sum is 45.

The square root of 257499117 is about 16046.7790225952. The cubic root of 257499117 is about 636.1974363293.

The spelling of 257499117 in words is "two hundred fifty-seven million, four hundred ninety-nine thousand, one hundred seventeen".