12928217 has 8 divisors (see below), whose sum is σ = 13132800. Its totient is φ = 12725440.

The previous prime is 12928213. The next prime is 12928247. The reversal of 12928217 is 71282921.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 12928217 - 2² = 12928213 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12928213) 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 7 ways as a sum of consecutive naturals, for example, 21284 + ... + 21882.

It is an arithmetic number, because the mean of its divisors is an integer number (1641600).

Almost surely, 2^12928217 is an apocalyptic number.

It is an amenable number.

12928217 is a deficient number, since it is larger than the sum of its proper divisors (204583).

12928217 is a wasteful number, since it uses less digits than its factorization.

12928217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 903.

The product of its digits is 4032, while the sum is 32.

The square root of 12928217 is about 3595.5829847189. The cubic root of 12928217 is about 234.6998854902.

The spelling of 12928217 in words is "twelve million, nine hundred twenty-eight thousand, two hundred seventeen".