12686705 has 4 divisors (see below), whose sum is σ = 15224052. Its totient is φ = 10149360.

The previous prime is 12686647. The next prime is 12686747. The reversal of 12686705 is 50768621.

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

It can be written as a sum of positive squares in 2 ways, for example, as 8690704 + 3996001 = 2948^2 + 1999^2 .

It is not a de Polignac number, because 12686705 - 2¹⁰ = 12685681 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1268666 + ... + 1268675.

It is an arithmetic number, because the mean of its divisors is an integer number (3806013).

Almost surely, 2^12686705 is an apocalyptic number.

It is an amenable number.

12686705 is a deficient number, since it is larger than the sum of its proper divisors (2537347).

12686705 is an equidigital number, since it uses as much as digits as its factorization.

12686705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2537346.

The product of its (nonzero) digits is 20160, while the sum is 35.

The square root of 12686705 is about 3561.8401143229. The cubic root of 12686705 is about 233.2292131826.

The spelling of 12686705 in words is "twelve million, six hundred eighty-six thousand, seven hundred five".