399125 has 16 divisors (see below), whose sum is σ = 519168. Its totient is φ = 306000.

The previous prime is 399107. The next prime is 399131. The reversal of 399125 is 521993.

It is not a de Polignac number, because 399125 - 2¹⁶ = 333589 is a prime.

It is a Duffinian number.

It is a Curzon 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 399125.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3824 + ... + 3926.

It is an arithmetic number, because the mean of its divisors is an integer number (32448).

2³⁹⁹¹²⁵ is an apocalyptic number.

It is an amenable number.

399125 is a deficient number, since it is larger than the sum of its proper divisors (120043).

399125 is a wasteful number, since it uses less digits than its factorization.

399125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149 (or 139 counting only the distinct ones).

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

The square root of 399125 is about 631.7634050814. The cubic root of 399125 is about 73.6268652910.

The spelling of 399125 in words is "three hundred ninety-nine thousand, one hundred twenty-five".