12511687 has 2 divisors, whose sum is σ = 12511688. Its totient is φ = 12511686.

The previous prime is 12511663. The next prime is 12511703. The reversal of 12511687 is 78611521.

It is a strong prime.

It is an emirp because it is prime and its reverse (78611521) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12511687 - 2²³ = 4123079 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12511607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6255843 + 6255844.

It is an arithmetic number, because the mean of its divisors is an integer number (6255844).

Almost surely, 2^12511687 is an apocalyptic number.

12511687 is a deficient number, since it is larger than the sum of its proper divisors (1).

12511687 is an equidigital number, since it uses as much as digits as its factorization.

12511687 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3360, while the sum is 31.

The square root of 12511687 is about 3537.1863111801. The cubic root of 12511687 is about 232.1517474826.

The spelling of 12511687 in words is "twelve million, five hundred eleven thousand, six hundred eighty-seven".