257752427 has 2 divisors, whose sum is σ = 257752428. Its totient is φ = 257752426.

The previous prime is 257752403. The next prime is 257752441. The reversal of 257752427 is 724257752.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 257752427 - 2⁸ = 257752171 is a prime.

It is not a weakly prime, because it can be changed into another prime (257752447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128876213 + 128876214.

It is an arithmetic number, because the mean of its divisors is an integer number (128876214).

Almost surely, 2^257752427 is an apocalyptic number.

257752427 is a deficient number, since it is larger than the sum of its proper divisors (1).

257752427 is an equidigital number, since it uses as much as digits as its factorization.

257752427 is an evil number, because the sum of its binary digits is even.

The product of its digits is 274400, while the sum is 41.

The square root of 257752427 is about 16054.6699436644. The cubic root of 257752427 is about 636.4059837849.

The spelling of 257752427 in words is "two hundred fifty-seven million, seven hundred fifty-two thousand, four hundred twenty-seven".