257484259 has 2 divisors, whose sum is σ = 257484260. Its totient is φ = 257484258.

The previous prime is 257484251. The next prime is 257484281. The reversal of 257484259 is 952484752.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 257484259 - 2³ = 257484251 is a prime.

It is not a weakly prime, because it can be changed into another prime (257484251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128742129 + 128742130.

It is an arithmetic number, because the mean of its divisors is an integer number (128742130).

Almost surely, 2^257484259 is an apocalyptic number.

257484259 is a deficient number, since it is larger than the sum of its proper divisors (1).

257484259 is an equidigital number, since it uses as much as digits as its factorization.

257484259 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 806400, while the sum is 46.

The square root of 257484259 is about 16046.3160569646. The cubic root of 257484259 is about 636.1851996487.

The spelling of 257484259 in words is "two hundred fifty-seven million, four hundred eighty-four thousand, two hundred fifty-nine".