12743638 has 8 divisors (see below), whose sum is σ = 19476288. Its totient is φ = 6251544.

The previous prime is 12743629. The next prime is 12743639. The reversal of 12743638 is 83634721.

It is a happy number.

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

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12743639) 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 3 ways as a sum of consecutive naturals, for example, 60006 + ... + 60217.

It is an arithmetic number, because the mean of its divisors is an integer number (2434536).

Almost surely, 2^12743638 is an apocalyptic number.

12743638 is a deficient number, since it is larger than the sum of its proper divisors (6732650).

12743638 is a wasteful number, since it uses less digits than its factorization.

12743638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120278.

The product of its digits is 24192, while the sum is 34.

The square root of 12743638 is about 3569.8232449240. The cubic root of 12743638 is about 233.5775732794.

The spelling of 12743638 in words is "twelve million, seven hundred forty-three thousand, six hundred thirty-eight".