12913621 has 8 divisors (see below), whose sum is σ = 14792000. Its totient is φ = 11043648.

The previous prime is 12913601. The next prime is 12913643. The reversal of 12913621 is 12631921.

12913621 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 12913621 - 2¹³ = 12905429 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 (12913601) 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, 1645 + ... + 5341.

It is an arithmetic number, because the mean of its divisors is an integer number (1849000).

Almost surely, 2^12913621 is an apocalyptic number.

It is an amenable number.

12913621 is a deficient number, since it is larger than the sum of its proper divisors (1878379).

12913621 is an equidigital number, since it uses as much as digits as its factorization.

12913621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4203.

The product of its digits is 648, while the sum is 25.

The square root of 12913621 is about 3593.5526989318. The cubic root of 12913621 is about 234.6115265788.

The spelling of 12913621 in words is "twelve million, nine hundred thirteen thousand, six hundred twenty-one".