257376641 has 4 divisors (see below), whose sum is σ = 270922800. Its totient is φ = 243830484.

The previous prime is 257376593. The next prime is 257376643. The reversal of 257376641 is 146673752.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 257376641 - 2¹⁸ = 257114497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (257376643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6773051 + ... + 6773088.

It is an arithmetic number, because the mean of its divisors is an integer number (67730700).

Almost surely, 2^257376641 is an apocalyptic number.

It is an amenable number.

257376641 is a deficient number, since it is larger than the sum of its proper divisors (13546159).

257376641 is a wasteful number, since it uses less digits than its factorization.

257376641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13546158.

The product of its digits is 211680, while the sum is 41.

The square root of 257376641 is about 16042.9623511370. The cubic root of 257376641 is about 636.0965540750.

The spelling of 257376641 in words is "two hundred fifty-seven million, three hundred seventy-six thousand, six hundred forty-one".