399575 has 12 divisors (see below), whose sum is σ = 540888. Its totient is φ = 290400.

The previous prime is 399571. The next prime is 399577. The reversal of 399575 is 575993.

It is not a de Polignac number, because 399575 - 2² = 399571 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399571) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 452 + ... + 1001.

It is an arithmetic number, because the mean of its divisors is an integer number (45074).

2³⁹⁹⁵⁷⁵ is an apocalyptic number.

399575 is a deficient number, since it is larger than the sum of its proper divisors (141313).

399575 is a wasteful number, since it uses less digits than its factorization.

399575 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1474 (or 1469 counting only the distinct ones).

The product of its digits is 42525, while the sum is 38.

The square root of 399575 is about 632.1194507370. The cubic root of 399575 is about 73.6545255022.

The spelling of 399575 in words is "three hundred ninety-nine thousand, five hundred seventy-five".