12939621 has 8 divisors (see below), whose sum is σ = 17447040. Its totient is φ = 8529312.

The previous prime is 12939613. The next prime is 12939637. The reversal of 12939621 is 12693921.

12939621 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 not a de Polignac number, because 12939621 - 2³ = 12939613 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12939611) 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, 23965 + ... + 24498.

It is an arithmetic number, because the mean of its divisors is an integer number (2180880).

Almost surely, 2^12939621 is an apocalyptic number.

It is an amenable number.

12939621 is a deficient number, since it is larger than the sum of its proper divisors (4507419).

12939621 is an equidigital number, since it uses as much as digits as its factorization.

12939621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48555.

The product of its digits is 5832, while the sum is 33.

The square root of 12939621 is about 3597.1684697829. The cubic root of 12939621 is about 234.7688749183.

The spelling of 12939621 in words is "twelve million, nine hundred thirty-nine thousand, six hundred twenty-one".