258523 has 4 divisors (see below), whose sum is σ = 259560. Its totient is φ = 257488.

The previous prime is 258521. The next prime is 258527. The reversal of 258523 is 325852.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 258523 - 2¹ = 258521 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (258521) 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 in 3 ways as a sum of consecutive naturals, for example, 111 + ... + 727.

It is an arithmetic number, because the mean of its divisors is an integer number (64890).

2²⁵⁸⁵²³ is an apocalyptic number.

258523 is a deficient number, since it is larger than the sum of its proper divisors (1037).

258523 is an equidigital number, since it uses as much as digits as its factorization.

258523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1036.

The product of its digits is 2400, while the sum is 25.

The square root of 258523 is about 508.4515709485. The cubic root of 258523 is about 63.7039549605.

The spelling of 258523 in words is "two hundred fifty-eight thousand, five hundred twenty-three".