12940637 has 4 divisors (see below), whose sum is σ = 13117980. Its totient is φ = 12763296.

The previous prime is 12940619. The next prime is 12940643. The reversal of 12940637 is 73604921.

12940637 is digitally balanced in base 3, 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 5067001 + 7873636 = 2251^2 + 2806^2 .

It is a cyclic number.

It is not a de Polignac number, because 12940637 - 2⁸ = 12940381 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12940337) 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, 88562 + ... + 88707.

It is an arithmetic number, because the mean of its divisors is an integer number (3279495).

Almost surely, 2^12940637 is an apocalyptic number.

It is an amenable number.

12940637 is a deficient number, since it is larger than the sum of its proper divisors (177343).

12940637 is an equidigital number, since it uses as much as digits as its factorization.

12940637 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177342.

The product of its (nonzero) digits is 9072, while the sum is 32.

The square root of 12940637 is about 3597.3096891983. The cubic root of 12940637 is about 234.7750193264.

The spelling of 12940637 in words is "twelve million, nine hundred forty thousand, six hundred thirty-seven".