12687965 has 4 divisors (see below), whose sum is σ = 15225564. Its totient is φ = 10150368.

The previous prime is 12687947. The next prime is 12687971. The reversal of 12687965 is 56978621.

12687965 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 can be written as a sum of positive squares in 2 ways, for example, as 4605316 + 8082649 = 2146^2 + 2843^2 .

It is a cyclic number.

It is not a de Polignac number, because 12687965 - 2¹⁶ = 12622429 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1268792 + ... + 1268801.

It is an arithmetic number, because the mean of its divisors is an integer number (3806391).

Almost surely, 2^12687965 is an apocalyptic number.

It is an amenable number.

12687965 is a deficient number, since it is larger than the sum of its proper divisors (2537599).

12687965 is an equidigital number, since it uses as much as digits as its factorization.

12687965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2537598.

The product of its digits is 181440, while the sum is 44.

The square root of 12687965 is about 3562.0169847995. The cubic root of 12687965 is about 233.2369341021.

The spelling of 12687965 in words is "twelve million, six hundred eighty-seven thousand, nine hundred sixty-five".