258811 has 4 divisors (see below), whose sum is σ = 295792. Its totient is φ = 221832.

The previous prime is 258809. The next prime is 258827. The reversal of 258811 is 118852.

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

It is a cyclic number.

It is not a de Polignac number, because 258811 - 2¹ = 258809 is a prime.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (258871) 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, 18480 + ... + 18493.

It is an arithmetic number, because the mean of its divisors is an integer number (73948).

2²⁵⁸⁸¹¹ is an apocalyptic number.

258811 is a deficient number, since it is larger than the sum of its proper divisors (36981).

258811 is an equidigital number, since it uses as much as digits as its factorization.

258811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36980.

The product of its digits is 640, while the sum is 25.

The square root of 258811 is about 508.7347049298. The cubic root of 258811 is about 63.7276020252.

It can be divided in two parts, 25 and 8811, that added together give a square (8836 = 94²).

The spelling of 258811 in words is "two hundred fifty-eight thousand, eight hundred eleven".