257372643 has 8 divisors (see below), whose sum is σ = 374360256. Its totient is φ = 155983400.

The previous prime is 257372597. The next prime is 257372671. The reversal of 257372643 is 346273752.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 257372643 - 2⁶ = 257372579 is a prime.

It is not an unprimeable number, because it can be changed into a prime (257372443) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 3899553 + ... + 3899618.

It is an arithmetic number, because the mean of its divisors is an integer number (46795032).

Almost surely, 2^257372643 is an apocalyptic number.

257372643 is a deficient number, since it is larger than the sum of its proper divisors (116987613).

257372643 is a wasteful number, since it uses less digits than its factorization.

257372643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7799185.

The product of its digits is 211680, while the sum is 39.

The square root of 257372643 is about 16042.8377477303. The cubic root of 257372643 is about 636.0932604231.

The spelling of 257372643 in words is "two hundred fifty-seven million, three hundred seventy-two thousand, six hundred forty-three".