257435459 has 2 divisors, whose sum is σ = 257435460. Its totient is φ = 257435458.

The previous prime is 257435447. The next prime is 257435491. The reversal of 257435459 is 954534752.

257435459 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 257435459 - 2⁸ = 257435203 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (257435359) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128717729 + 128717730.

It is an arithmetic number, because the mean of its divisors is an integer number (128717730).

Almost surely, 2^257435459 is an apocalyptic number.

257435459 is a deficient number, since it is larger than the sum of its proper divisors (1).

257435459 is an equidigital number, since it uses as much as digits as its factorization.

257435459 is an evil number, because the sum of its binary digits is even.

The product of its digits is 756000, while the sum is 44.

The square root of 257435459 is about 16044.7953866667. The cubic root of 257435459 is about 636.1450058657.

The spelling of 257435459 in words is "two hundred fifty-seven million, four hundred thirty-five thousand, four hundred fifty-nine".