12245561 has 2 divisors, whose sum is σ = 12245562. Its totient is φ = 12245560.

The previous prime is 12245549. The next prime is 12245573. The reversal of 12245561 is 16554221.

It is a balanced prime because it is at equal distance from previous prime (12245549) and next prime (12245573).

It can be written as a sum of positive squares in only one way, i.e., 12033961 + 211600 = 3469^2 + 460^2 .

It is an emirp because it is prime and its reverse (16554221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12245561 - 2¹⁴ = 12229177 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12245561.

It is not a weakly prime, because it can be changed into another prime (12245501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6122780 + 6122781.

It is an arithmetic number, because the mean of its divisors is an integer number (6122781).

Almost surely, 2^12245561 is an apocalyptic number.

It is an amenable number.

12245561 is a deficient number, since it is larger than the sum of its proper divisors (1).

12245561 is an equidigital number, since it uses as much as digits as its factorization.

12245561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2400, while the sum is 26.

The square root of 12245561 is about 3499.3657996843. The cubic root of 12245561 is about 230.4939667128.

Adding to 12245561 its reverse (16554221), we get a palindrome (28799782).

The spelling of 12245561 in words is "twelve million, two hundred forty-five thousand, five hundred sixty-one".