12228869 has 2 divisors, whose sum is σ = 12228870. Its totient is φ = 12228868.

The previous prime is 12228859. The next prime is 12228889. The reversal of 12228869 is 96882221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8850625 + 3378244 = 2975^2 + 1838^2 .

It is a cyclic number.

It is not a de Polignac number, because 12228869 - 2⁸ = 12228613 is a prime.

It is a super-2 number, since 2×12228869² = 299090474038322, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12228809) 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 as a sum of consecutive naturals, namely, 6114434 + 6114435.

It is an arithmetic number, because the mean of its divisors is an integer number (6114435).

Almost surely, 2^12228869 is an apocalyptic number.

It is an amenable number.

12228869 is a deficient number, since it is larger than the sum of its proper divisors (1).

12228869 is an equidigital number, since it uses as much as digits as its factorization.

12228869 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27648, while the sum is 38.

The square root of 12228869 is about 3496.9799827851. The cubic root of 12228869 is about 230.3891898401.

The spelling of 12228869 in words is "twelve million, two hundred twenty-eight thousand, eight hundred sixty-nine".