257074381 has 4 divisors (see below), whose sum is σ = 268251552. Its totient is φ = 245897212.

The previous prime is 257074379. The next prime is 257074397. The reversal of 257074381 is 183470752.

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 257074381 - 2¹ = 257074379 is a prime.

It is a super-2 number, since 2×257074381² = 132174474733066322, 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 257074381.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257074331) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5588551 + ... + 5588596.

It is an arithmetic number, because the mean of its divisors is an integer number (67062888).

Almost surely, 2^257074381 is an apocalyptic number.

It is an amenable number.

257074381 is a deficient number, since it is larger than the sum of its proper divisors (11177171).

257074381 is a wasteful number, since it uses less digits than its factorization.

257074381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11177170.

The product of its (nonzero) digits is 47040, while the sum is 37.

The square root of 257074381 is about 16033.5392537019. The cubic root of 257074381 is about 635.8474485126.

The spelling of 257074381 in words is "two hundred fifty-seven million, seventy-four thousand, three hundred eighty-one".