12516647 has 12 divisors (see below), whose sum is σ = 14787864. Its totient is φ = 10501920.

The previous prime is 12516643. The next prime is 12516659. The reversal of 12516647 is 74661521.

It is not a de Polignac number, because 12516647 - 2² = 12516643 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12516643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1508 + ... + 5225.

It is an arithmetic number, because the mean of its divisors is an integer number (1232322).

Almost surely, 2^12516647 is an apocalyptic number.

12516647 is a deficient number, since it is larger than the sum of its proper divisors (2271217).

12516647 is a wasteful number, since it uses less digits than its factorization.

12516647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6770 (or 6757 counting only the distinct ones).

The product of its digits is 10080, while the sum is 32.

The square root of 12516647 is about 3537.8873639504. The cubic root of 12516647 is about 232.1824206855.

The spelling of 12516647 in words is "twelve million, five hundred sixteen thousand, six hundred forty-seven".