257421974 has 8 divisors (see below), whose sum is σ = 391020960. Its totient is φ = 127081656.

The previous prime is 257421959. The next prime is 257421977. The reversal of 257421974 is 479124752.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257421977) 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, 814469 + ... + 814784.

It is an arithmetic number, because the mean of its divisors is an integer number (48877620).

Almost surely, 2^257421974 is an apocalyptic number.

257421974 is a deficient number, since it is larger than the sum of its proper divisors (133598986).

257421974 is a wasteful number, since it uses less digits than its factorization.

257421974 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1629334.

The product of its digits is 141120, while the sum is 41.

The square root of 257421974 is about 16044.3751514355. The cubic root of 257421974 is about 636.1338981429.

The spelling of 257421974 in words is "two hundred fifty-seven million, four hundred twenty-one thousand, nine hundred seventy-four".