12679681 has 10 divisors (see below), whose sum is σ = 14794882. Its totient is φ = 10866240.

The previous prime is 12679673. The next prime is 12679687. The reversal of 12679681 is 18697621.

It can be written as a sum of positive squares in only one way, i.e., 8643600 + 4036081 = 2940^2 + 2009^2 .

It is not a de Polignac number, because 12679681 - 2³ = 12679673 is a prime.

It is a super-2 number, since 2×12679681² = 321548620523522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12679687) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 240 + ... + 5041.

Almost surely, 2^12679681 is an apocalyptic number.

It is an amenable number.

12679681 is a deficient number, since it is larger than the sum of its proper divisors (2115201).

12679681 is an frugal number, since it uses more digits than its factorization.

12679681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5309 (or 5288 counting only the distinct ones).

The product of its digits is 36288, while the sum is 40.

The square root of 12679681 is about 3560.8539706087. The cubic root of 12679681 is about 233.1861627500.

The spelling of 12679681 in words is "twelve million, six hundred seventy-nine thousand, six hundred eighty-one".