12143644 has 24 divisors (see below), whose sum is σ = 22725360. Its totient is φ = 5657856.

The previous prime is 12143639. The next prime is 12143687. The reversal of 12143644 is 44634121.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6442 + ... + 8110.

It is an arithmetic number, because the mean of its divisors is an integer number (946890).

Almost surely, 2^12143644 is an apocalyptic number.

It is an amenable number.

12143644 is a deficient number, since it is larger than the sum of its proper divisors (10581716).

12143644 is a wasteful number, since it uses less digits than its factorization.

12143644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1797 (or 1795 counting only the distinct ones).

The product of its digits is 2304, while the sum is 25.

The square root of 12143644 is about 3484.7731633494. The cubic root of 12143644 is about 229.8527349664.

Adding to 12143644 its reverse (44634121), we get a palindrome (56777765).

The spelling of 12143644 in words is "twelve million, one hundred forty-three thousand, six hundred forty-four".