257134457 has 8 divisors (see below), whose sum is σ = 268762560. Its totient is φ = 245543760.

The previous prime is 257134441. The next prime is 257134481. The reversal of 257134457 is 754431752.

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 257134457 - 2⁴ = 257134441 is a prime.

It is a super-2 number, since 2×257134457² = 132236257953369698, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 257134457.

It is not an unprimeable number, because it can be changed into a prime (257134417) 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, 5207 + ... + 23267.

It is an arithmetic number, because the mean of its divisors is an integer number (33595320).

Almost surely, 2^257134457 is an apocalyptic number.

It is an amenable number.

257134457 is a deficient number, since it is larger than the sum of its proper divisors (11628103).

257134457 is a wasteful number, since it uses less digits than its factorization.

257134457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18703.

The product of its digits is 117600, while the sum is 38.

The square root of 257134457 is about 16035.4125921349. The cubic root of 257134457 is about 635.8969752889.

The spelling of 257134457 in words is "two hundred fifty-seven million, one hundred thirty-four thousand, four hundred fifty-seven".