12642621 has 4 divisors (see below), whose sum is σ = 16856832. Its totient is φ = 8428412.

The previous prime is 12642613. The next prime is 12642631. The reversal of 12642621 is 12624621.

12642621 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, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12642621 - 2³ = 12642613 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12642591 and 12642600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12642631) 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, 2107101 + ... + 2107106.

It is an arithmetic number, because the mean of its divisors is an integer number (4214208).

Almost surely, 2^12642621 is an apocalyptic number.

It is an amenable number.

12642621 is a deficient number, since it is larger than the sum of its proper divisors (4214211).

12642621 is an equidigital number, since it uses as much as digits as its factorization.

12642621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4214210.

The product of its digits is 1152, while the sum is 24.

The square root of 12642621 is about 3555.6463547434. The cubic root of 12642621 is about 232.9587565993.

The spelling of 12642621 in words is "twelve million, six hundred forty-two thousand, six hundred twenty-one".