257598442 has 4 divisors (see below), whose sum is σ = 386397666. Its totient is φ = 128799220.

The previous prime is 257598427. The next prime is 257598461. The reversal of 257598442 is 244895752.

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., 165611161 + 91987281 = 12869^2 + 9591^2 .

It is a junction number, because it is equal to n+sod(n) for n = 257598392 and 257598401.

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 as a sum of consecutive naturals, namely, 64399609 + ... + 64399612.

Almost surely, 2^257598442 is an apocalyptic number.

257598442 is a deficient number, since it is larger than the sum of its proper divisors (128799224).

257598442 is a wasteful number, since it uses less digits than its factorization.

257598442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128799223.

The product of its digits is 806400, while the sum is 46.

The square root of 257598442 is about 16049.8735820567. The cubic root of 257598442 is about 636.2792258490.

The spelling of 257598442 in words is "two hundred fifty-seven million, five hundred ninety-eight thousand, four hundred forty-two".