257498642 has 4 divisors (see below), whose sum is σ = 386247966. Its totient is φ = 128749320.

The previous prime is 257498599. The next prime is 257498653. The reversal of 257498642 is 246894752.

257498642 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 138274081 + 119224561 = 11759^2 + 10919^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64374659 + ... + 64374662.

Almost surely, 2^257498642 is an apocalyptic number.

257498642 is a deficient number, since it is larger than the sum of its proper divisors (128749324).

257498642 is a wasteful number, since it uses less digits than its factorization.

257498642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128749323.

The product of its digits is 967680, while the sum is 47.

The square root of 257498642 is about 16046.7642221103. The cubic root of 257498642 is about 636.1970451383.

The spelling of 257498642 in words is "two hundred fifty-seven million, four hundred ninety-eight thousand, six hundred forty-two".