12225646 has 16 divisors (see below), whose sum is σ = 19167840. Its totient is φ = 5840800.

The previous prime is 12225643. The next prime is 12225649. The reversal of 12225646 is 64652221.

It is an interprime number because it is at equal distance from previous prime (12225643) and next prime (12225649).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12225641) 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 7 ways as a sum of consecutive naturals, for example, 4815 + ... + 6901.

It is an arithmetic number, because the mean of its divisors is an integer number (1197990).

Almost surely, 2^12225646 is an apocalyptic number.

12225646 is a deficient number, since it is larger than the sum of its proper divisors (6942194).

12225646 is a wasteful number, since it uses less digits than its factorization.

12225646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2219.

The product of its digits is 5760, while the sum is 28.

The square root of 12225646 is about 3496.5191262168. The cubic root of 12225646 is about 230.3689478591.

Adding to 12225646 its reverse (64652221), we get a palindrome (76877867).

The spelling of 12225646 in words is "twelve million, two hundred twenty-five thousand, six hundred forty-six".