12728642 has 8 divisors (see below), whose sum is σ = 19109136. Its totient is φ = 6358932.

The previous prime is 12728609. The next prime is 12728657. The reversal of 12728642 is 24682721.

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

It is a junction number, because it is equal to n+sod(n) for n = 12728599 and 12728608.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1673 + ... + 5315.

It is an arithmetic number, because the mean of its divisors is an integer number (2388642).

Almost surely, 2^12728642 is an apocalyptic number.

12728642 is a deficient number, since it is larger than the sum of its proper divisors (6380494).

12728642 is a wasteful number, since it uses less digits than its factorization.

12728642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5392.

The product of its digits is 10752, while the sum is 32.

The square root of 12728642 is about 3567.7222425520. The cubic root of 12728642 is about 233.4859169793.

The spelling of 12728642 in words is "twelve million, seven hundred twenty-eight thousand, six hundred forty-two".