258091 has 4 divisors (see below), whose sum is σ = 262384. Its totient is φ = 253800.

The previous prime is 258067. The next prime is 258101. The reversal of 258091 is 190852.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-258091 is a prime.

It is a super-2 number, since 2×258091² = 133221928562, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (258031) 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, 2055 + ... + 2176.

It is an arithmetic number, because the mean of its divisors is an integer number (65596).

2²⁵⁸⁰⁹¹ is an apocalyptic number.

258091 is a deficient number, since it is larger than the sum of its proper divisors (4293).

258091 is an equidigital number, since it uses as much as digits as its factorization.

258091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4292.

The product of its (nonzero) digits is 720, while the sum is 25.

The square root of 258091 is about 508.0265741081. The cubic root of 258091 is about 63.6684514118.

The spelling of 258091 in words is "two hundred fifty-eight thousand, ninety-one".