12686612 has 6 divisors (see below), whose sum is σ = 22201578. Its totient is φ = 6343304.

The previous prime is 12686599. The next prime is 12686627. The reversal of 12686612 is 21668621.

It can be written as a sum of positive squares in only one way, i.e., 12630916 + 55696 = 3554^2 + 236^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1585823 + ... + 1585830.

It is an arithmetic number, because the mean of its divisors is an integer number (3700263).

Almost surely, 2^12686612 is an apocalyptic number.

It is an amenable number.

12686612 is a deficient number, since it is larger than the sum of its proper divisors (9514966).

12686612 is a wasteful number, since it uses less digits than its factorization.

12686612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3171657 (or 3171655 counting only the distinct ones).

The product of its digits is 6912, while the sum is 32.

The square root of 12686612 is about 3561.8270592492. The cubic root of 12686612 is about 233.2286432850.

Subtracting 12686612 from its reverse (21668621), we obtain a square (8982009 = 2997²).

The spelling of 12686612 in words is "twelve million, six hundred eighty-six thousand, six hundred twelve".