12669221 has 8 divisors (see below), whose sum is σ = 12870144. Its totient is φ = 12470080.

The previous prime is 12669211. The next prime is 12669229. The reversal of 12669221 is 12296621.

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 12669221 - 2¹⁴ = 12652837 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 (12669229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21290 + ... + 21876.

It is an arithmetic number, because the mean of its divisors is an integer number (1608768).

Almost surely, 2^12669221 is an apocalyptic number.

It is an amenable number.

12669221 is a deficient number, since it is larger than the sum of its proper divisors (200923).

12669221 is a wasteful number, since it uses less digits than its factorization.

12669221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 891.

The product of its digits is 2592, while the sum is 29.

The square root of 12669221 is about 3559.3849187746. The cubic root of 12669221 is about 233.1220234318.

The spelling of 12669221 in words is "twelve million, six hundred sixty-nine thousand, two hundred twenty-one".