12917680 has 20 divisors (see below), whose sum is σ = 30033792. Its totient is φ = 5167040.

The previous prime is 12917677. The next prime is 12917693. The reversal of 12917680 is 8671921.

It is a happy number.

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

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, 80656 + ... + 80815.

Almost surely, 2^12917680 is an apocalyptic number.

12917680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12917680 is an abundant number, since it is smaller than the sum of its proper divisors (17116112).

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

12917680 is a wasteful number, since it uses less digits than its factorization.

12917680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161484 (or 161478 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 34.

The square root of 12917680 is about 3594.1174160008. The cubic root of 12917680 is about 234.6361049789.

The spelling of 12917680 in words is "twelve million, nine hundred seventeen thousand, six hundred eighty".