12715687 has 4 divisors (see below), whose sum is σ = 12725320. Its totient is φ = 12706056.

The previous prime is 12715667. The next prime is 12715691. The reversal of 12715687 is 78651721.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 78651721 = 6977 ⋅11273.

It is a cyclic number.

It is not a de Polignac number, because 12715687 - 2¹¹ = 12713639 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12715607) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2448 + ... + 5605.

It is an arithmetic number, because the mean of its divisors is an integer number (3181330).

Almost surely, 2^12715687 is an apocalyptic number.

12715687 is a deficient number, since it is larger than the sum of its proper divisors (9633).

12715687 is an equidigital number, since it uses as much as digits as its factorization.

12715687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9632.

The product of its digits is 23520, while the sum is 37.

The square root of 12715687 is about 3565.9061961863. The cubic root of 12715687 is about 233.4066773967.

The spelling of 12715687 in words is "twelve million, seven hundred fifteen thousand, six hundred eighty-seven".