12225761 has 2 divisors, whose sum is σ = 12225762. Its totient is φ = 12225760.

The previous prime is 12225757. The next prime is 12225769. The reversal of 12225761 is 16752221.

12225761 is digitally balanced in base 2, 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., 11015761 + 1210000 = 3319^2 + 1100^2 .

It is an emirp because it is prime and its reverse (16752221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12225761 - 2² = 12225757 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 12225761.

It is not a weakly prime, because it can be changed into another prime (12225769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6112880 + 6112881.

It is an arithmetic number, because the mean of its divisors is an integer number (6112881).

Almost surely, 2^12225761 is an apocalyptic number.

It is an amenable number.

12225761 is a deficient number, since it is larger than the sum of its proper divisors (1).

12225761 is an equidigital number, since it uses as much as digits as its factorization.

12225761 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1680, while the sum is 26.

The square root of 12225761 is about 3496.5355711046. The cubic root of 12225761 is about 230.3696701753.

Adding to 12225761 its reverse (16752221), we get a palindrome (28977982).

The spelling of 12225761 in words is "twelve million, two hundred twenty-five thousand, seven hundred sixty-one".