257441357 has 2 divisors, whose sum is σ = 257441358. Its totient is φ = 257441356.

The previous prime is 257441351. The next prime is 257441383. The reversal of 257441357 is 753144752.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 242549476 + 14891881 = 15574^2 + 3859^2 .

It is a cyclic number.

It is not a de Polignac number, because 257441357 - 2⁶ = 257441293 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 257441357.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (257441351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128720678 + 128720679.

It is an arithmetic number, because the mean of its divisors is an integer number (128720679).

Almost surely, 2^257441357 is an apocalyptic number.

It is an amenable number.

257441357 is a deficient number, since it is larger than the sum of its proper divisors (1).

257441357 is an equidigital number, since it uses as much as digits as its factorization.

257441357 is an evil number, because the sum of its binary digits is even.

The product of its digits is 117600, while the sum is 38.

The square root of 257441357 is about 16044.9791835328. The cubic root of 257441357 is about 636.1498639825.

The spelling of 257441357 in words is "two hundred fifty-seven million, four hundred forty-one thousand, three hundred fifty-seven".