12721612 has 12 divisors (see below), whose sum is σ = 22369816. Its totient is φ = 6330240.

The previous prime is 12721609. The next prime is 12721651. The reversal of 12721612 is 21612721.

It is a happy number.

It is a hoax number, since the sum of its digits (22) coincides with the sum of the digits of its distinct prime factors.

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, 6693 + ... + 8380.

Almost surely, 2^12721612 is an apocalyptic number.

It is an amenable number.

12721612 is a deficient number, since it is larger than the sum of its proper divisors (9648204).

12721612 is a wasteful number, since it uses less digits than its factorization.

12721612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15288 (or 15286 counting only the distinct ones).

The product of its digits is 336, while the sum is 22.

The square root of 12721612 is about 3566.7368840440. The cubic root of 12721612 is about 233.4429244833.

The spelling of 12721612 in words is "twelve million, seven hundred twenty-one thousand, six hundred twelve".