12516651 has 24 divisors (see below), whose sum is σ = 21007584. Its totient is φ = 7032960.

The previous prime is 12516643. The next prime is 12516659. The reversal of 12516651 is 15661521.

It is a happy number.

12516651 is a `hidden beast` number, since 1 + 2 + 5 + 1 + 6 + 651 = 666.

It is an interprime number because it is at equal distance from previous prime (12516643) and next prime (12516659).

It is not a de Polignac number, because 12516651 - 2³ = 12516643 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12516659) 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 23 ways as a sum of consecutive naturals, for example, 2215 + ... + 5471.

It is an arithmetic number, because the mean of its divisors is an integer number (875316).

Almost surely, 2^12516651 is an apocalyptic number.

12516651 is a deficient number, since it is larger than the sum of its proper divisors (8490933).

12516651 is a wasteful number, since it uses less digits than its factorization.

12516651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3331 (or 3328 counting only the distinct ones).

The product of its digits is 1800, while the sum is 27.

The square root of 12516651 is about 3537.8879292595. The cubic root of 12516651 is about 232.1824454187.

The spelling of 12516651 in words is "twelve million, five hundred sixteen thousand, six hundred fifty-one".