257574421 has 6 divisors (see below), whose sum is σ = 278912130. Its totient is φ = 237760848.

The previous prime is 257574413. The next prime is 257574437. The reversal of 257574421 is 124475752.

257574421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 324900 + 257249521 = 570^2 + 16039^2 .

It is not a de Polignac number, because 257574421 - 2³ = 257574413 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257574451) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 761886 + ... + 762223.

It is an arithmetic number, because the mean of its divisors is an integer number (46485355).

Almost surely, 2^257574421 is an apocalyptic number.

It is an amenable number.

257574421 is a deficient number, since it is larger than the sum of its proper divisors (21337709).

257574421 is a wasteful number, since it uses less digits than its factorization.

257574421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1524135 (or 1524122 counting only the distinct ones).

The product of its digits is 78400, while the sum is 37.

The square root of 257574421 is about 16049.1252409594. The cubic root of 257574421 is about 636.2594476000.

The spelling of 257574421 in words is "two hundred fifty-seven million, five hundred seventy-four thousand, four hundred twenty-one".