12228577 has 2 divisors, whose sum is σ = 12228578. Its totient is φ = 12228576.

The previous prime is 12228563. The next prime is 12228583. The reversal of 12228577 is 77582221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12222016 + 6561 = 3496^2 + 81^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12228577 is a prime.

It is not a weakly prime, because it can be changed into another prime (12228527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6114288 + 6114289.

It is an arithmetic number, because the mean of its divisors is an integer number (6114289).

Almost surely, 2^12228577 is an apocalyptic number.

It is an amenable number.

12228577 is a deficient number, since it is larger than the sum of its proper divisors (1).

12228577 is an equidigital number, since it uses as much as digits as its factorization.

12228577 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15680, while the sum is 34.

The square root of 12228577 is about 3496.9382322254. The cubic root of 12228577 is about 230.3873560870.

The spelling of 12228577 in words is "twelve million, two hundred twenty-eight thousand, five hundred seventy-seven".