12561680 has 40 divisors (see below), whose sum is σ = 30480192. Its totient is φ = 4805504.

The previous prime is 12561671. The next prime is 12561701. The reversal of 12561680 is 8616521.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

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 7 ways as a sum of consecutive naturals, for example, 1574 + ... + 5253.

Almost surely, 2^12561680 is an apocalyptic number.

12561680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12561680 is an abundant number, since it is smaller than the sum of its proper divisors (17918512).

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

12561680 is a wasteful number, since it uses less digits than its factorization.

12561680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6863 (or 6857 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 29.

The square root of 12561680 is about 3544.2460411207. The cubic root of 12561680 is about 232.4605398018.

The spelling of 12561680 in words is "twelve million, five hundred sixty-one thousand, six hundred eighty".