258591 has 4 divisors (see below), whose sum is σ = 344792. Its totient is φ = 172392.

The previous prime is 258581. The next prime is 258607. The reversal of 258591 is 195852.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 258591 - 2⁶ = 258527 is a prime.

It is an Ulam number.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (258521) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43096 + ... + 43101.

It is an arithmetic number, because the mean of its divisors is an integer number (86198).

2²⁵⁸⁵⁹¹ is an apocalyptic number.

258591 is a deficient number, since it is larger than the sum of its proper divisors (86201).

258591 is an equidigital number, since it uses as much as digits as its factorization.

258591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86200.

The product of its digits is 3600, while the sum is 30.

The square root of 258591 is about 508.5184362440. The cubic root of 258591 is about 63.7095398784.

The spelling of 258591 in words is "two hundred fifty-eight thousand, five hundred ninety-one".