257260427 has 2 divisors, whose sum is σ = 257260428. Its totient is φ = 257260426.

The previous prime is 257260417. The next prime is 257260441. The reversal of 257260427 is 724062752.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 257260427 - 2¹² = 257256331 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (257260417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128630213 + 128630214.

It is an arithmetic number, because the mean of its divisors is an integer number (128630214).

Almost surely, 2^257260427 is an apocalyptic number.

257260427 is a deficient number, since it is larger than the sum of its proper divisors (1).

257260427 is an equidigital number, since it uses as much as digits as its factorization.

257260427 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 47040, while the sum is 35.

The square root of 257260427 is about 16039.3399801862. The cubic root of 257260427 is about 636.0008001717. Note that the first 3 decimals are identical.

The spelling of 257260427 in words is "two hundred fifty-seven million, two hundred sixty thousand, four hundred twenty-seven".