257412491 has 8 divisors (see below), whose sum is σ = 301027584. Its totient is φ = 215507880.

The previous prime is 257412469. The next prime is 257412503. The reversal of 257412491 is 194214752.

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

It is a de Polignac number, because none of the positive numbers 2^k-257412491 is a prime.

It is a super-2 number, since 2×257412491² = 132522381045650162, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (257412401) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 427295 + ... + 427896.

It is an arithmetic number, because the mean of its divisors is an integer number (37628448).

Almost surely, 2^257412491 is an apocalyptic number.

257412491 is a deficient number, since it is larger than the sum of its proper divisors (43615093).

257412491 is an equidigital number, since it uses as much as digits as its factorization.

257412491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 855241.

The product of its digits is 20160, while the sum is 35.

The square root of 257412491 is about 16044.0796245843. The cubic root of 257412491 is about 636.1260866732.

The spelling of 257412491 in words is "two hundred fifty-seven million, four hundred twelve thousand, four hundred ninety-one".