259139 has 4 divisors (see below), whose sum is σ = 260160. Its totient is φ = 258120.

The previous prime is 259123. The next prime is 259151. The reversal of 259139 is 931952.

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 259139 - 2⁴ = 259123 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 259139.

It is not an unprimeable number, because it can be changed into a prime (259159) 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, 209 + ... + 749.

It is an arithmetic number, because the mean of its divisors is an integer number (65040).

2²⁵⁹¹³⁹ is an apocalyptic number.

259139 is a deficient number, since it is larger than the sum of its proper divisors (1021).

259139 is an equidigital number, since it uses as much as digits as its factorization.

259139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1020.

The product of its digits is 2430, while the sum is 29.

The square root of 259139 is about 509.0569712714. The cubic root of 259139 is about 63.7545120477.

The spelling of 259139 in words is "two hundred fifty-nine thousand, one hundred thirty-nine".