12909866 has 8 divisors (see below), whose sum is σ = 19776960. Its totient is φ = 6317548.

The previous prime is 12909839. The next prime is 12909887. The reversal of 12909866 is 66890921.

It is a sphenic number, since it is the product of 3 distinct primes.

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, 68576 + ... + 68763.

It is an arithmetic number, because the mean of its divisors is an integer number (2472120).

Almost surely, 2^12909866 is an apocalyptic number.

12909866 is a deficient number, since it is larger than the sum of its proper divisors (6867094).

12909866 is a wasteful number, since it uses less digits than its factorization.

12909866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137388.

The product of its (nonzero) digits is 46656, while the sum is 41.

The square root of 12909866 is about 3593.0301974796. The cubic root of 12909866 is about 234.5887843987.

The spelling of 12909866 in words is "twelve million, nine hundred nine thousand, eight hundred sixty-six".