420022241 has 2 divisors, whose sum is σ = 420022242. Its totient is φ = 420022240.

The previous prime is 420022199. The next prime is 420022289. The reversal of 420022241 is 142220024.

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., 419061841 + 960400 = 20471^2 + 980^2 .

It is a cyclic number.

It is not a de Polignac number, because 420022241 - 2⁶ = 420022177 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (420021241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210011120 + 210011121.

It is an arithmetic number, because the mean of its divisors is an integer number (210011121).

Almost surely, 2^420022241 is an apocalyptic number.

It is an amenable number.

420022241 is a deficient number, since it is larger than the sum of its proper divisors (1).

420022241 is an equidigital number, since it uses as much as digits as its factorization.

420022241 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 256, while the sum is 17.

The square root of 420022241 is about 20494.4441495738. Note that the first 3 decimals coincide. The cubic root of 420022241 is about 748.9004575370.

Adding to 420022241 its reverse (142220024), we get a palindrome (562242265).

The spelling of 420022241 in words is "four hundred twenty million, twenty-two thousand, two hundred forty-one".