12399412 has 12 divisors (see below), whose sum is σ = 21865536. Its totient is φ = 6152120.

The previous prime is 12399407. The next prime is 12399427. The reversal of 12399412 is 21499321.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11308 + ... + 12355.

It is an arithmetic number, because the mean of its divisors is an integer number (1822128).

Almost surely, 2^12399412 is an apocalyptic number.

It is an amenable number.

12399412 is a deficient number, since it is larger than the sum of its proper divisors (9466124).

12399412 is a wasteful number, since it uses less digits than its factorization.

12399412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23798 (or 23796 counting only the distinct ones).

The product of its digits is 3888, while the sum is 31.

The square root of 12399412 is about 3521.2798809524. The cubic root of 12399412 is about 231.4552468508.

Subtracting 12399412 from its reverse (21499321), we obtain a palindrome (9099909).

It can be divided in two parts, 12 and 399412, that added together give a square (399424 = 632²).

The spelling of 12399412 in words is "twelve million, three hundred ninety-nine thousand, four hundred twelve".