257355242 has 16 divisors (see below), whose sum is σ = 398902272. Its totient is φ = 124396560.

The previous prime is 257355233. The next prime is 257355277. The reversal of 257355242 is 242553752.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 86768 + ... + 89684.

It is an arithmetic number, because the mean of its divisors is an integer number (24931392).

Almost surely, 2^257355242 is an apocalyptic number.

257355242 is a deficient number, since it is larger than the sum of its proper divisors (141547030).

257355242 is a wasteful number, since it uses less digits than its factorization.

257355242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4373.

The product of its digits is 84000, while the sum is 35.

The square root of 257355242 is about 16042.2954093234. The cubic root of 257355242 is about 636.0789246489.

The spelling of 257355242 in words is "two hundred fifty-seven million, three hundred fifty-five thousand, two hundred forty-two".