12643229 has 4 divisors (see below), whose sum is σ = 12681084. Its totient is φ = 12605376.

The previous prime is 12643201. The next prime is 12643249. The reversal of 12643229 is 92234621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 92234621 = 6689 ⋅13789.

It can be written as a sum of positive squares in 2 ways, for example, as 4831204 + 7812025 = 2198^2 + 2795^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12643229 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 (12643249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18422 + ... + 19095.

It is an arithmetic number, because the mean of its divisors is an integer number (3170271).

Almost surely, 2^12643229 is an apocalyptic number.

It is an amenable number.

12643229 is a deficient number, since it is larger than the sum of its proper divisors (37855).

12643229 is an equidigital number, since it uses as much as digits as its factorization.

12643229 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37854.

The product of its digits is 5184, while the sum is 29.

The square root of 12643229 is about 3555.7318515321. The cubic root of 12643229 is about 232.9624909688.

The spelling of 12643229 in words is "twelve million, six hundred forty-three thousand, two hundred twenty-nine".