12640516 has 24 divisors (see below), whose sum is σ = 25373376. Its totient is φ = 5397600.

The previous prime is 12640513. The next prime is 12640517. The reversal of 12640516 is 61504621.

It is not an unprimeable number, because it can be changed into a prime (12640513) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 9066 + ... + 10366.

It is an arithmetic number, because the mean of its divisors is an integer number (1057224).

Almost surely, 2^12640516 is an apocalyptic number.

It is an amenable number.

12640516 is an abundant number, since it is smaller than the sum of its proper divisors (12732860).

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

12640516 is a wasteful number, since it uses less digits than its factorization.

12640516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1659 (or 1657 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 12640516 is about 3555.3503343553. The cubic root of 12640516 is about 232.9458266485.

The spelling of 12640516 in words is "twelve million, six hundred forty thousand, five hundred sixteen".