399259 has 4 divisors (see below), whose sum is σ = 456304. Its totient is φ = 342216.

The previous prime is 399241. The next prime is 399263. The reversal of 399259 is 952993.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 952993 = 53 ⋅17981.

It is not a de Polignac number, because 399259 - 2⁵ = 399227 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (399239) 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, 28512 + ... + 28525.

It is an arithmetic number, because the mean of its divisors is an integer number (114076).

2³⁹⁹²⁵⁹ is an apocalyptic number.

399259 is a deficient number, since it is larger than the sum of its proper divisors (57045).

399259 is an equidigital number, since it uses as much as digits as its factorization.

399259 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57044.

The product of its digits is 21870, while the sum is 37.

The square root of 399259 is about 631.8694485414. The cubic root of 399259 is about 73.6351040600.

The spelling of 399259 in words is "three hundred ninety-nine thousand, two hundred fifty-nine".