12505687 has 2 divisors, whose sum is σ = 12505688. Its totient is φ = 12505686.

The previous prime is 12505681. The next prime is 12505709. The reversal of 12505687 is 78650521.

It is a weak prime.

It is an emirp because it is prime and its reverse (78650521) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12505687 - 2¹⁵ = 12472919 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12505681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6252843 + 6252844.

It is an arithmetic number, because the mean of its divisors is an integer number (6252844).

Almost surely, 2^12505687 is an apocalyptic number.

12505687 is a deficient number, since it is larger than the sum of its proper divisors (1).

12505687 is an equidigital number, since it uses as much as digits as its factorization.

12505687 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16800, while the sum is 34.

The square root of 12505687 is about 3536.3380777296. The cubic root of 12505687 is about 232.1146319654.

The spelling of 12505687 in words is "twelve million, five hundred five thousand, six hundred eighty-seven".