12228643 has 4 divisors (see below), whose sum is σ = 13975600. Its totient is φ = 10481688.

The previous prime is 12228613. The next prime is 12228653. The reversal of 12228643 is 34682221.

12228643 is digitally balanced in base 3, 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 is not a de Polignac number, because 12228643 - 2¹³ = 12220451 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12228613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 873468 + ... + 873481.

It is an arithmetic number, because the mean of its divisors is an integer number (3493900).

Almost surely, 2^12228643 is an apocalyptic number.

12228643 is a deficient number, since it is larger than the sum of its proper divisors (1746957).

12228643 is an equidigital number, since it uses as much as digits as its factorization.

12228643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1746956.

The product of its digits is 4608, while the sum is 28.

The square root of 12228643 is about 3496.9476690394. The cubic root of 12228643 is about 230.3877705680.

The spelling of 12228643 in words is "twelve million, two hundred twenty-eight thousand, six hundred forty-three".