399201 has 8 divisors (see below), whose sum is σ = 580704. Its totient is φ = 241920.

The previous prime is 399197. The next prime is 399221. The reversal of 399201 is 102993.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 399201 - 2² = 399197 is a prime.

It is a super-2 number, since 2×399201² = 318722876802, which contains 22 as substring.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

399201 is a lucky number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 399201.

It is not an unprimeable number, because it can be changed into a prime (399221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6016 + ... + 6081.

It is an arithmetic number, because the mean of its divisors is an integer number (72588).

2³⁹⁹²⁰¹ is an apocalyptic number.

It is an amenable number.

399201 is a deficient number, since it is larger than the sum of its proper divisors (181503).

399201 is a wasteful number, since it uses less digits than its factorization.

399201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12111.

The product of its (nonzero) digits is 486, while the sum is 24.

The square root of 399201 is about 631.8235513179. The cubic root of 399201 is about 73.6315382519.

The spelling of 399201 in words is "three hundred ninety-nine thousand, two hundred one".