12686771 has 4 divisors (see below), whose sum is σ = 12718200. Its totient is φ = 12655344.

The previous prime is 12686759. The next prime is 12686783. The reversal of 12686771 is 17768621.

12686771 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (12686759) and next prime (12686783).

It is a cyclic number.

It is not a de Polignac number, because 12686771 - 2¹⁸ = 12424627 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12688771) 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, 15101 + ... + 15918.

It is an arithmetic number, because the mean of its divisors is an integer number (3179550).

Almost surely, 2^12686771 is an apocalyptic number.

12686771 is a deficient number, since it is larger than the sum of its proper divisors (31429).

12686771 is an equidigital number, since it uses as much as digits as its factorization.

12686771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31428.

The product of its digits is 28224, while the sum is 38.

The square root of 12686771 is about 3561.8493791849. The cubic root of 12686771 is about 233.2296176244.

The spelling of 12686771 in words is "twelve million, six hundred eighty-six thousand, seven hundred seventy-one".