257042018 has 8 divisors (see below), whose sum is σ = 398000640. Its totient is φ = 124375140.

The previous prime is 257041999. The next prime is 257042021. The reversal of 257042018 is 810240752.

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

It is a Curzon number.

It is an unprimeable number.

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, 2072858 + ... + 2072981.

It is an arithmetic number, because the mean of its divisors is an integer number (49750080).

Almost surely, 2^257042018 is an apocalyptic number.

257042018 is a deficient number, since it is larger than the sum of its proper divisors (140958622).

257042018 is a wasteful number, since it uses less digits than its factorization.

257042018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4145872.

The product of its (nonzero) digits is 4480, while the sum is 29.

The square root of 257042018 is about 16032.5299937346. The cubic root of 257042018 is about 635.8207651918.

The spelling of 257042018 in words is "two hundred fifty-seven million, forty-two thousand, eighteen".