12644742 has 24 divisors (see below), whose sum is σ = 27799128. Its totient is φ = 3831520.

The previous prime is 12644741. The next prime is 12644759. The reversal of 12644742 is 24744621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12644741) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7983 + ... + 9434.

It is an arithmetic number, because the mean of its divisors is an integer number (1158297).

Almost surely, 2^12644742 is an apocalyptic number.

12644742 is an abundant number, since it is smaller than the sum of its proper divisors (15154386).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12644742 is a wasteful number, since it uses less digits than its factorization.

12644742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17444 (or 17433 counting only the distinct ones).

The product of its digits is 10752, while the sum is 30.

The square root of 12644742 is about 3555.9446002434. The cubic root of 12644742 is about 232.9717833784.

It can be divided in two parts, 1264 and 4742, that added together give a palindrome (6006).

The spelling of 12644742 in words is "twelve million, six hundred forty-four thousand, seven hundred forty-two".