12643718 has 8 divisors (see below), whose sum is σ = 19102440. Its totient is φ = 6276240.

The previous prime is 12643717. The next prime is 12643723. The reversal of 12643718 is 81734621.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12643717) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 22463 + ... + 23018.

It is an arithmetic number, because the mean of its divisors is an integer number (2387805).

Almost surely, 2^12643718 is an apocalyptic number.

12643718 is a deficient number, since it is larger than the sum of its proper divisors (6458722).

12643718 is a wasteful number, since it uses less digits than its factorization.

12643718 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45622.

The product of its digits is 8064, while the sum is 32.

The square root of 12643718 is about 3555.8006130828. The cubic root of 12643718 is about 232.9654943468.

The spelling of 12643718 in words is "twelve million, six hundred forty-three thousand, seven hundred eighteen".