257002442 has 4 divisors (see below), whose sum is σ = 385503666. Its totient is φ = 128501220.

The previous prime is 257002423. The next prime is 257002451. The reversal of 257002442 is 244200752.

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., 145467721 + 111534721 = 12061^2 + 10561^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64250609 + ... + 64250612.

Almost surely, 2^257002442 is an apocalyptic number.

257002442 is a deficient number, since it is larger than the sum of its proper divisors (128501224).

257002442 is a wasteful number, since it uses less digits than its factorization.

257002442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128501223.

The product of its (nonzero) digits is 4480, while the sum is 26.

The square root of 257002442 is about 16031.2957055879. The cubic root of 257002442 is about 635.7881317021.

The spelling of 257002442 in words is "two hundred fifty-seven million, two thousand, four hundred forty-two".