12920668 has 6 divisors (see below), whose sum is σ = 22611176. Its totient is φ = 6460332.

The previous prime is 12920657. The next prime is 12920669. The reversal of 12920668 is 86602921.

It is a happy number.

12920668 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12920669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1615080 + ... + 1615087.

Almost surely, 2^12920668 is an apocalyptic number.

It is an amenable number.

12920668 is a deficient number, since it is larger than the sum of its proper divisors (9690508).

12920668 is a wasteful number, since it uses less digits than its factorization.

12920668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3230171 (or 3230169 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 12920668 is about 3594.5330712069. The cubic root of 12920668 is about 234.6541948792.

The spelling of 12920668 in words is "twelve million, nine hundred twenty thousand, six hundred sixty-eight".