12928642 has 8 divisors (see below), whose sum is σ = 19469196. Its totient is φ = 6438912.

The previous prime is 12928637. The next prime is 12928673. The reversal of 12928642 is 24682921.

It can be written as a sum of positive squares in 2 ways, for example, as 11363641 + 1565001 = 3371^2 + 1251^2 .

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 = 12928598 and 12928607.

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, 12063 + ... + 13090.

Almost surely, 2^12928642 is an apocalyptic number.

12928642 is a deficient number, since it is larger than the sum of its proper divisors (6540554).

12928642 is a wasteful number, since it uses less digits than its factorization.

12928642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25412.

The product of its digits is 13824, while the sum is 34.

The square root of 12928642 is about 3595.6420845240. The cubic root of 12928642 is about 234.7024572900.

The spelling of 12928642 in words is "twelve million, nine hundred twenty-eight thousand, six hundred forty-two".