12644642 has 16 divisors (see below), whose sum is σ = 19388160. Its totient is φ = 6183408.

The previous prime is 12644591. The next prime is 12644669. The reversal of 12644642 is 24644621.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26159 + ... + 26637.

It is an arithmetic number, because the mean of its divisors is an integer number (1211760).

Almost surely, 2^12644642 is an apocalyptic number.

12644642 is a deficient number, since it is larger than the sum of its proper divisors (6743518).

12644642 is a wasteful number, since it uses less digits than its factorization.

12644642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 745.

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

The square root of 12644642 is about 3555.9305392541. The cubic root of 12644642 is about 232.9711692301.

The spelling of 12644642 in words is "twelve million, six hundred forty-four thousand, six hundred forty-two".