12228289 has 2 divisors, whose sum is σ = 12228290. Its totient is φ = 12228288.

The previous prime is 12228269. The next prime is 12228299. The reversal of 12228289 is 98282221.

It is a happy number.

12228289 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12194064 + 34225 = 3492^2 + 185^2 .

It is a cyclic number.

It is not a de Polignac number, because 12228289 - 2⁵ = 12228257 is a prime.

It is not a weakly prime, because it can be changed into another prime (12228239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6114144 + 6114145.

It is an arithmetic number, because the mean of its divisors is an integer number (6114145).

Almost surely, 2^12228289 is an apocalyptic number.

It is an amenable number.

12228289 is a deficient number, since it is larger than the sum of its proper divisors (1).

12228289 is an equidigital number, since it uses as much as digits as its factorization.

12228289 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9216, while the sum is 34.

The square root of 12228289 is about 3496.8970531029. The cubic root of 12228289 is about 230.3855474252.

The spelling of 12228289 in words is "twelve million, two hundred twenty-eight thousand, two hundred eighty-nine".