12679221 has 8 divisors (see below), whose sum is σ = 16922080. Its totient is φ = 8444592.

The previous prime is 12679193. The next prime is 12679223. The reversal of 12679221 is 12297621.

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

It is not a de Polignac number, because 12679221 - 2⁶ = 12679157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12679223) 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, 5046 + ... + 7128.

It is an arithmetic number, because the mean of its divisors is an integer number (2115260).

Almost surely, 2^12679221 is an apocalyptic number.

It is an amenable number.

12679221 is a deficient number, since it is larger than the sum of its proper divisors (4242859).

12679221 is a wasteful number, since it uses less digits than its factorization.

12679221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4115.

The product of its digits is 3024, while the sum is 30.

The square root of 12679221 is about 3560.7893787754. The cubic root of 12679221 is about 233.1833428333.

The spelling of 12679221 in words is "twelve million, six hundred seventy-nine thousand, two hundred twenty-one".