12707621 has 4 divisors (see below), whose sum is σ = 12881772. Its totient is φ = 12533472.

The previous prime is 12707603. The next prime is 12707623. The reversal of 12707621 is 12670721.

12707621 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 3556996 + 9150625 = 1886^2 + 3025^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12707621 is a prime.

It is a super-2 number, since 2×12707621² = 322967262959282, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12707623) 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, 86966 + ... + 87111.

It is an arithmetic number, because the mean of its divisors is an integer number (3220443).

Almost surely, 2^12707621 is an apocalyptic number.

It is an amenable number.

12707621 is a deficient number, since it is larger than the sum of its proper divisors (174151).

12707621 is an equidigital number, since it uses as much as digits as its factorization.

12707621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174150.

The product of its (nonzero) digits is 1176, while the sum is 26.

The square root of 12707621 is about 3564.7750279646. The cubic root of 12707621 is about 233.3573143153.

The spelling of 12707621 in words is "twelve million, seven hundred seven thousand, six hundred twenty-one".