12621680 has 20 divisors (see below), whose sum is σ = 29345592. Its totient is φ = 5048640.

The previous prime is 12621671. The next prime is 12621703. The reversal of 12621680 is 8612621.

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 78806 + ... + 78965.

Almost surely, 2^12621680 is an apocalyptic number.

12621680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12621680 is an abundant number, since it is smaller than the sum of its proper divisors (16723912).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12621680 is a wasteful number, since it uses less digits than its factorization.

12621680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157784 (or 157778 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 12621680 is about 3552.7003814000. The cubic root of 12621680 is about 232.8300626812.

The spelling of 12621680 in words is "twelve million, six hundred twenty-one thousand, six hundred eighty".