12226421 has 8 divisors (see below), whose sum is σ = 12418560. Its totient is φ = 12035952.

The previous prime is 12226399. The next prime is 12226433. The reversal of 12226421 is 12462221.

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 a de Polignac number, because none of the positive numbers 2^k-12226421 is a prime.

It is a Duffinian number.

It is a plaindrome in base 15.

It is a junction number, because it is equal to n+sod(n) for n = 12226393 and 12226402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12226471) 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, 24056 + ... + 24558.

It is an arithmetic number, because the mean of its divisors is an integer number (1552320).

Almost surely, 2^12226421 is an apocalyptic number.

It is an amenable number.

12226421 is a deficient number, since it is larger than the sum of its proper divisors (192139).

12226421 is a wasteful number, since it uses less digits than its factorization.

12226421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 835.

The product of its digits is 384, while the sum is 20.

The square root of 12226421 is about 3496.6299489651. The cubic root of 12226421 is about 230.3738155545.

Adding to 12226421 its reverse (12462221), we get a palindrome (24688642).

The spelling of 12226421 in words is "twelve million, two hundred twenty-six thousand, four hundred twenty-one".