12421227 has 32 divisors (see below), whose sum is σ = 20579328. Its totient is φ = 6489216.

The previous prime is 12421223. The next prime is 12421229. The reversal of 12421227 is 72212421.

It is not a de Polignac number, because 12421227 - 2² = 12421223 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a plaindrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (12421223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 47098 + ... + 47360.

It is an arithmetic number, because the mean of its divisors is an integer number (643104).

Almost surely, 2^12421227 is an apocalyptic number.

12421227 is a deficient number, since it is larger than the sum of its proper divisors (8158101).

12421227 is a wasteful number, since it uses less digits than its factorization.

12421227 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 459.

The product of its digits is 448, while the sum is 21.

The square root of 12421227 is about 3524.3761150025. The cubic root of 12421227 is about 231.5909048424.

Adding to 12421227 its reverse (72212421), we get a palindrome (84633648).

The spelling of 12421227 in words is "twelve million, four hundred twenty-one thousand, two hundred twenty-seven".