257970241 has 2 divisors, whose sum is σ = 257970242. Its totient is φ = 257970240.

The previous prime is 257970233. The next prime is 257970269. The reversal of 257970241 is 142079752.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 196112016 + 61858225 = 14004^2 + 7865^2 .

It is a cyclic number.

It is not a de Polignac number, because 257970241 - 2³ = 257970233 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 257970241.

It is not a weakly prime, because it can be changed into another prime (257970211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128985120 + 128985121.

It is an arithmetic number, because the mean of its divisors is an integer number (128985121).

Almost surely, 2^257970241 is an apocalyptic number.

It is an amenable number.

257970241 is a deficient number, since it is larger than the sum of its proper divisors (1).

257970241 is an equidigital number, since it uses as much as digits as its factorization.

257970241 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 257970241 is about 16061.4520202876. The cubic root of 257970241 is about 636.5851985277.

The spelling of 257970241 in words is "two hundred fifty-seven million, nine hundred seventy thousand, two hundred forty-one".