258491 has 2 divisors, whose sum is σ = 258492. Its totient is φ = 258490.

The previous prime is 258487. The next prime is 258499. The reversal of 258491 is 194852.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 258491 - 2² = 258487 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (258499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 129245 + 129246.

It is an arithmetic number, because the mean of its divisors is an integer number (129246).

2²⁵⁸⁴⁹¹ is an apocalyptic number.

258491 is a deficient number, since it is larger than the sum of its proper divisors (1).

258491 is an equidigital number, since it uses as much as digits as its factorization.

258491 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2880, while the sum is 29.

The square root of 258491 is about 508.4201018843. The cubic root of 258491 is about 63.7013264250.

The spelling of 258491 in words is "two hundred fifty-eight thousand, four hundred ninety-one".