259599 has 4 divisors (see below), whose sum is σ = 346136. Its totient is φ = 173064.

The previous prime is 259583. The next prime is 259603. The reversal of 259599 is 995952.

259599 is digitally balanced in base 7, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 259599 - 2⁴ = 259583 is a prime.

It is a D-number.

It is a Duffinian number.

259599 is strictly pandigital in base 7.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (259099) 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, 43264 + ... + 43269.

It is an arithmetic number, because the mean of its divisors is an integer number (86534).

2²⁵⁹⁵⁹⁹ is an apocalyptic number.

259599 is a deficient number, since it is larger than the sum of its proper divisors (86537).

259599 is an equidigital number, since it uses as much as digits as its factorization.

259599 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86536.

The product of its digits is 36450, while the sum is 39.

The square root of 259599 is about 509.5085867775. The cubic root of 259599 is about 63.7922134868.

Subtracting from 259599 its sum of digits (39), we obtain a triangular number (259560 = T₇₂₀).

It can be divided in two parts, 259 and 599, that added together give a palindrome (858).

The spelling of 259599 in words is "two hundred fifty-nine thousand, five hundred ninety-nine".