12987812 has 12 divisors (see below), whose sum is σ = 22880256. Its totient is φ = 6450600.

The previous prime is 12987797. The next prime is 12987829. The reversal of 12987812 is 21878921.

It is an alternating number because its digits alternate between odd and even.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 10148 + ... + 11355.

It is an arithmetic number, because the mean of its divisors is an integer number (1906688).

Almost surely, 2^12987812 is an apocalyptic number.

It is an amenable number.

12987812 is a deficient number, since it is larger than the sum of its proper divisors (9892444).

12987812 is a wasteful number, since it uses less digits than its factorization.

12987812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21658 (or 21656 counting only the distinct ones).

The product of its digits is 16128, while the sum is 38.

The square root of 12987812 is about 3603.8607076301. The cubic root of 12987812 is about 235.0599635724.

The spelling of 12987812 in words is "twelve million, nine hundred eighty-seven thousand, eight hundred twelve".