399045 has 16 divisors (see below), whose sum is σ = 656640. Its totient is φ = 206784.

The previous prime is 399043. The next prime is 399059. The reversal of 399045 is 540993.

It is not a de Polignac number, because 399045 - 2¹ = 399043 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399043) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 196 + ... + 914.

It is an arithmetic number, because the mean of its divisors is an integer number (41040).

2³⁹⁹⁰⁴⁵ is an apocalyptic number.

It is an amenable number.

399045 is a deficient number, since it is larger than the sum of its proper divisors (257595).

399045 is a wasteful number, since it uses less digits than its factorization.

399045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 764.

The product of its (nonzero) digits is 4860, while the sum is 30.

The square root of 399045 is about 631.7000870666. The cubic root of 399045 is about 73.6219457438.

The spelling of 399045 in words is "three hundred ninety-nine thousand, forty-five".