399245 has 32 divisors (see below), whose sum is σ = 642816. Its totient is φ = 230400.

The previous prime is 399241. The next prime is 399263. The reversal of 399245 is 542993.

It is not a de Polignac number, because 399245 - 2² = 399241 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 399245.

It is not an unprimeable number, because it can be changed into a prime (399241) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6515 + ... + 6575.

It is an arithmetic number, because the mean of its divisors is an integer number (20088).

2³⁹⁹²⁴⁵ is an apocalyptic number.

399245 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

399245 is a deficient number, since it is larger than the sum of its proper divisors (243571).

399245 is a wasteful number, since it uses less digits than its factorization.

399245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101.

The product of its digits is 9720, while the sum is 32.

The square root of 399245 is about 631.8583702065. The cubic root of 399245 is about 73.6342433793.

The spelling of 399245 in words is "three hundred ninety-nine thousand, two hundred forty-five".