399225 has 12 divisors (see below), whose sum is σ = 660176. Its totient is φ = 212880.

The previous prime is 399221. The next prime is 399227. The reversal of 399225 is 522993.

It is not a de Polignac number, because 399225 - 2² = 399221 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 399192 and 399201.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 399225.

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

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2587 + ... + 2736.

2³⁹⁹²²⁵ is an apocalyptic number.

It is an amenable number.

399225 is a deficient number, since it is larger than the sum of its proper divisors (260951).

399225 is a wasteful number, since it uses less digits than its factorization.

399225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5336 (or 5331 counting only the distinct ones).

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

The square root of 399225 is about 631.8425436768. The cubic root of 399225 is about 73.6330138006.

The spelling of 399225 in words is "three hundred ninety-nine thousand, two hundred twenty-five".