12912660 has 72 divisors (see below), whose sum is σ = 40884480. Its totient is φ = 3292608.

The previous prime is 12912659. The next prime is 12912671. The reversal of 12912660 is 6621921.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2581 + ... + 5699.

It is an arithmetic number, because the mean of its divisors is an integer number (567840).

Almost surely, 2^12912660 is an apocalyptic number.

12912660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12912660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20442240).

12912660 is an abundant number, since it is smaller than the sum of its proper divisors (27971820).

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

12912660 is a wasteful number, since it uses less digits than its factorization.

12912660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3157 (or 3152 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 12912660 is about 3593.4189847553. The cubic root of 12912660 is about 234.6057066963.

The spelling of 12912660 in words is "twelve million, nine hundred twelve thousand, six hundred sixty".