258239 has 4 divisors (see below), whose sum is σ = 259440. Its totient is φ = 257040.

The previous prime is 258233. The next prime is 258241. The reversal of 258239 is 932852.

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 a de Polignac number, because none of the positive numbers 2^k-258239 is a prime.

It is a super-2 number, since 2×258239² = 133374762242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (258233) 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, 179 + ... + 740.

It is an arithmetic number, because the mean of its divisors is an integer number (64860).

2²⁵⁸²³⁹ is an apocalyptic number.

258239 is a deficient number, since it is larger than the sum of its proper divisors (1201).

258239 is an equidigital number, since it uses as much as digits as its factorization.

258239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1200.

The product of its digits is 4320, while the sum is 29.

The square root of 258239 is about 508.1722149036. The cubic root of 258239 is about 63.6806191229.

The spelling of 258239 in words is "two hundred fifty-eight thousand, two hundred thirty-nine".