258399 has 6 divisors (see below), whose sum is σ = 373256. Its totient is φ = 172260.

The previous prime is 258389. The next prime is 258403. The reversal of 258399 is 993852.

It is not a de Polignac number, because 258399 - 2⁸ = 258143 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 258399.

It is not an unprimeable number, because it can be changed into a prime (258319) 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 5 ways as a sum of consecutive naturals, for example, 14347 + ... + 14364.

2²⁵⁸³⁹⁹ is an apocalyptic number.

258399 is a deficient number, since it is larger than the sum of its proper divisors (114857).

258399 is a wasteful number, since it uses less digits than its factorization.

258399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28717 (or 28714 counting only the distinct ones).

The product of its digits is 19440, while the sum is 36.

The square root of 258399 is about 508.3296174728. The cubic root of 258399 is about 63.6937681767.

The spelling of 258399 in words is "two hundred fifty-eight thousand, three hundred ninety-nine".