257492701 has 2 divisors, whose sum is σ = 257492702. Its totient is φ = 257492700.

The previous prime is 257492699. The next prime is 257492749. The reversal of 257492701 is 107294752.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 212401476 + 45091225 = 14574^2 + 6715^2 .

It is a cyclic number.

It is not a de Polignac number, because 257492701 - 2¹ = 257492699 is a prime.

Together with 257492699, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (257492101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128746350 + 128746351.

It is an arithmetic number, because the mean of its divisors is an integer number (128746351).

Almost surely, 2^257492701 is an apocalyptic number.

It is an amenable number.

257492701 is a deficient number, since it is larger than the sum of its proper divisors (1).

257492701 is an equidigital number, since it uses as much as digits as its factorization.

257492701 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 35280, while the sum is 37.

The square root of 257492701 is about 16046.5791058406. The cubic root of 257492701 is about 636.1921523284.

The spelling of 257492701 in words is "two hundred fifty-seven million, four hundred ninety-two thousand, seven hundred one".