12644426 has 8 divisors (see below), whose sum is σ = 18982080. Its totient is φ = 6317068.

The previous prime is 12644393. The next prime is 12644459. The reversal of 12644426 is 62444621.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (12644393) and next prime (12644459).

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2495 + ... + 5613.

It is an arithmetic number, because the mean of its divisors is an integer number (2372760).

Almost surely, 2^12644426 is an apocalyptic number.

12644426 is a deficient number, since it is larger than the sum of its proper divisors (6337654).

12644426 is a wasteful number, since it uses less digits than its factorization.

12644426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5148.

The product of its digits is 9216, while the sum is 29.

The square root of 12644426 is about 3555.9001673275. The cubic root of 12644426 is about 232.9698426588.

The spelling of 12644426 in words is "twelve million, six hundred forty-four thousand, four hundred twenty-six".