12512681 has 2 divisors, whose sum is σ = 12512682. Its totient is φ = 12512680.

The previous prime is 12512653. The next prime is 12512693. The reversal of 12512681 is 18621521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9554281 + 2958400 = 3091^2 + 1720^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12512681 is a prime.

It is a super-2 number, since 2×12512681² = 313134371615522, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12512681.

It is not a weakly prime, because it can be changed into another prime (12512651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6256340 + 6256341.

It is an arithmetic number, because the mean of its divisors is an integer number (6256341).

Almost surely, 2^12512681 is an apocalyptic number.

It is an amenable number.

12512681 is a deficient number, since it is larger than the sum of its proper divisors (1).

12512681 is an equidigital number, since it uses as much as digits as its factorization.

12512681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 960, while the sum is 26.

The square root of 12512681 is about 3537.3268155487. The cubic root of 12512681 is about 232.1578951408.

The spelling of 12512681 in words is "twelve million, five hundred twelve thousand, six hundred eighty-one".