12422281 has 2 divisors, whose sum is σ = 12422282. Its totient is φ = 12422280.

The previous prime is 12422243. The next prime is 12422287. The reversal of 12422281 is 18222421.

12422281 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12362256 + 60025 = 3516^2 + 245^2 .

It is a cyclic number.

It is not a de Polignac number, because 12422281 - 2⁷ = 12422153 is a prime.

It is a super-2 number, since 2×12422281² = 308626130485922, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (12422287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6211140 + 6211141.

It is an arithmetic number, because the mean of its divisors is an integer number (6211141).

Almost surely, 2^12422281 is an apocalyptic number.

It is an amenable number.

12422281 is a deficient number, since it is larger than the sum of its proper divisors (1).

12422281 is an equidigital number, since it uses as much as digits as its factorization.

12422281 is an evil number, because the sum of its binary digits is even.

The product of its digits is 512, while the sum is 22.

The square root of 12422281 is about 3524.5256418418. The cubic root of 12422281 is about 231.5974551858.

The spelling of 12422281 in words is "twelve million, four hundred twenty-two thousand, two hundred eighty-one".