12940681 has 8 divisors (see below), whose sum is σ = 13970880. Its totient is φ = 11915472.

The previous prime is 12940661. The next prime is 12940703. The reversal of 12940681 is 18604921.

It is a happy number.

12940681 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12940681 - 2⁵ = 12940649 is a prime.

It is a super-2 number, since 2×12940681² = 334922449487522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12940661) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5550 + ... + 7528.

It is an arithmetic number, because the mean of its divisors is an integer number (1746360).

Almost surely, 2^12940681 is an apocalyptic number.

It is an amenable number.

12940681 is a deficient number, since it is larger than the sum of its proper divisors (1030199).

12940681 is a wasteful number, since it uses less digits than its factorization.

12940681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2495.

The product of its (nonzero) digits is 3456, while the sum is 31.

The square root of 12940681 is about 3597.3158048745. The cubic root of 12940681 is about 234.7752854155.

The spelling of 12940681 in words is "twelve million, nine hundred forty thousand, six hundred eighty-one".