258139 has 4 divisors (see below), whose sum is σ = 295024. Its totient is φ = 221256.

The previous prime is 258131. The next prime is 258143. The reversal of 258139 is 931852.

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

It is not a de Polignac number, because 258139 - 2³ = 258131 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (258131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18432 + ... + 18445.

It is an arithmetic number, because the mean of its divisors is an integer number (73756).

2²⁵⁸¹³⁹ is an apocalyptic number.

258139 is a deficient number, since it is larger than the sum of its proper divisors (36885).

258139 is an equidigital number, since it uses as much as digits as its factorization.

258139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36884.

The product of its digits is 2160, while the sum is 28.

The square root of 258139 is about 508.0738135350. The cubic root of 258139 is about 63.6723982060.

The spelling of 258139 in words is "two hundred fifty-eight thousand, one hundred thirty-nine".