12224561 has 2 divisors, whose sum is σ = 12224562. Its totient is φ = 12224560.

The previous prime is 12224557. The next prime is 12224587. The reversal of 12224561 is 16542221.

It is a happy number.

12224561 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9728161 + 2496400 = 3119^2 + 1580^2 .

It is a cyclic number.

It is not a de Polignac number, because 12224561 - 2² = 12224557 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a nialpdrome in base 16.

It is not a weakly prime, because it can be changed into another prime (12224501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6112280 + 6112281.

It is an arithmetic number, because the mean of its divisors is an integer number (6112281).

Almost surely, 2^12224561 is an apocalyptic number.

It is an amenable number.

12224561 is a deficient number, since it is larger than the sum of its proper divisors (1).

12224561 is an equidigital number, since it uses as much as digits as its factorization.

12224561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 960, while the sum is 23.

The square root of 12224561 is about 3496.3639684678. The cubic root of 12224561 is about 230.3621327399.

Adding to 12224561 its reverse (16542221), we get a palindrome (28766782).

The spelling of 12224561 in words is "twelve million, two hundred twenty-four thousand, five hundred sixty-one".