257060491 has 2 divisors, whose sum is σ = 257060492. Its totient is φ = 257060490.

The previous prime is 257060483. The next prime is 257060501. The reversal of 257060491 is 194060752.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 257060491 - 2³ = 257060483 is a prime.

It is a super-2 number, since 2×257060491² = 132160192066322162, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (257060431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128530245 + 128530246.

It is an arithmetic number, because the mean of its divisors is an integer number (128530246).

Almost surely, 2^257060491 is an apocalyptic number.

257060491 is a deficient number, since it is larger than the sum of its proper divisors (1).

257060491 is an equidigital number, since it uses as much as digits as its factorization.

257060491 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15120, while the sum is 34.

The square root of 257060491 is about 16033.1060933308. The cubic root of 257060491 is about 635.8359964702.

The spelling of 257060491 in words is "two hundred fifty-seven million, sixty thousand, four hundred ninety-one".