12630621 has 4 divisors (see below), whose sum is σ = 16840832. Its totient is φ = 8420412.

The previous prime is 12630619. The next prime is 12630623. The reversal of 12630621 is 12603621.

It is a happy number.

12630621 is digitally balanced in base 2 and base 4, because in such bases 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, and also an emirpimes, since its reverse is a distinct semiprime: 12603621 = 3 ⋅4201207.

It is an interprime number because it is at equal distance from previous prime (12630619) and next prime (12630623).

It is not a de Polignac number, because 12630621 - 2¹ = 12630619 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 (12630623) 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, 2105101 + ... + 2105106.

It is an arithmetic number, because the mean of its divisors is an integer number (4210208).

Almost surely, 2^12630621 is an apocalyptic number.

It is an amenable number.

12630621 is a deficient number, since it is larger than the sum of its proper divisors (4210211).

12630621 is an equidigital number, since it uses as much as digits as its factorization.

12630621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4210210.

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 12630621 is about 3553.9584972253. The cubic root of 12630621 is about 232.8850274252.

Subtracting from 12630621 its reverse (12603621), we obtain a cube (27000 = 30³).

The spelling of 12630621 in words is "twelve million, six hundred thirty thousand, six hundred twenty-one".