399246525 has 72 divisors (see below), whose sum is σ = 765571040. Its totient is φ = 198288000.

The previous prime is 399246511. The next prime is 399246557. The reversal of 399246525 is 525642993.

399246525 is a `hidden beast` number, since 39 + 92 + 4 + 6 + 525 = 666.

It is not a de Polignac number, because 399246525 - 2⁵ = 399246493 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 260010 + ... + 261540.

Almost surely, 2^399246525 is an apocalyptic number.

It is an amenable number.

399246525 is a deficient number, since it is larger than the sum of its proper divisors (366324515).

399246525 is a wasteful number, since it uses less digits than its factorization.

399246525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1627 (or 1619 counting only the distinct ones).

The product of its digits is 583200, while the sum is 45.

The square root of 399246525 is about 19981.1542459388. The cubic root of 399246525 is about 736.3433713299.

The spelling of 399246525 in words is "three hundred ninety-nine million, two hundred forty-six thousand, five hundred twenty-five".