258615 has 24 divisors (see below), whose sum is σ = 512928. Its totient is φ = 118080.

The previous prime is 258613. The next prime is 258617. The reversal of 258615 is 516852.

It is an interprime number because it is at equal distance from previous prime (258613) and next prime (258617).

It is not a de Polignac number, because 258615 - 2¹ = 258613 is a prime.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 258615.

It is not an unprimeable number, because it can be changed into a prime (258611) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 96 + ... + 725.

It is an arithmetic number, because the mean of its divisors is an integer number (21372).

2²⁵⁸⁶¹⁵ is an apocalyptic number.

258615 is a deficient number, since it is larger than the sum of its proper divisors (254313).

258615 is a wasteful number, since it uses less digits than its factorization.

258615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 839 (or 836 counting only the distinct ones).

The product of its digits is 2400, while the sum is 27.

The square root of 258615 is about 508.5420336609. The cubic root of 258615 is about 63.7115107921.

It can be divided in two parts, 2586 and 15, that added together give a square (2601 = 51²).

The spelling of 258615 in words is "two hundred fifty-eight thousand, six hundred fifteen".