42244001 has 2 divisors, whose sum is σ = 42244002. Its totient is φ = 42244000.

The previous prime is 42243989. The next prime is 42244003. The reversal of 42244001 is 10044224.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 32947600 + 9296401 = 5740^2 + 3049^2 .

It is a cyclic number.

It is not a de Polignac number, because 42244001 - 2⁶ = 42243937 is a prime.

Together with 42244003, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (42244003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21122000 + 21122001.

It is an arithmetic number, because the mean of its divisors is an integer number (21122001).

Almost surely, 2^42244001 is an apocalyptic number.

It is an amenable number.

42244001 is a deficient number, since it is larger than the sum of its proper divisors (1).

42244001 is an equidigital number, since it uses as much as digits as its factorization.

42244001 is an odious number, because the sum of its binary digits is odd.

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

The square root of 42244001 is about 6499.5385220799. The cubic root of 42244001 is about 348.2745032144.

Adding to 42244001 its reverse (10044224), we get a palindrome (52288225).

The spelling of 42244001 in words is "forty-two million, two hundred forty-four thousand, one".