12641637 has 8 divisors (see below), whose sum is σ = 17214336. Its totient is φ = 8248352.

The previous prime is 12641623. The next prime is 12641639. The reversal of 12641637 is 73614621.

12641637 is digitally balanced in base 3, 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 12641637 - 2⁷ = 12641509 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12641639) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 44688 + ... + 44969.

It is an arithmetic number, because the mean of its divisors is an integer number (2151792).

Almost surely, 2^12641637 is an apocalyptic number.

It is an amenable number.

12641637 is a deficient number, since it is larger than the sum of its proper divisors (4572699).

12641637 is an equidigital number, since it uses as much as digits as its factorization.

12641637 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89707.

The product of its digits is 6048, while the sum is 30.

The square root of 12641637 is about 3555.5079805845. The cubic root of 12641637 is about 232.9527125634.

The spelling of 12641637 in words is "twelve million, six hundred forty-one thousand, six hundred thirty-seven".