12222461 has 2 divisors, whose sum is σ = 12222462. Its totient is φ = 12222460.

The previous prime is 12222433. The next prime is 12222517. The reversal of 12222461 is 16422221.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11689561 + 532900 = 3419^2 + 730^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12222461 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12222761) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6111230 + 6111231.

It is an arithmetic number, because the mean of its divisors is an integer number (6111231).

Almost surely, 2^12222461 is an apocalyptic number.

It is an amenable number.

12222461 is a deficient number, since it is larger than the sum of its proper divisors (1).

12222461 is an equidigital number, since it uses as much as digits as its factorization.

12222461 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 384, while the sum is 20.

The square root of 12222461 is about 3496.0636435855. The cubic root of 12222461 is about 230.3489410411.

Adding to 12222461 its reverse (16422221), we get a palindrome (28644682).

The spelling of 12222461 in words is "twelve million, two hundred twenty-two thousand, four hundred sixty-one".