422342521 has 2 divisors, whose sum is σ = 422342522. Its totient is φ = 422342520.

The previous prime is 422342497. The next prime is 422342549. The reversal of 422342521 is 125243224.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 400440121 + 21902400 = 20011^2 + 4680^2 .

It is a cyclic number.

It is not a de Polignac number, because 422342521 - 2⁵ = 422342489 is a prime.

It is not a weakly prime, because it can be changed into another prime (422343521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211171260 + 211171261.

It is an arithmetic number, because the mean of its divisors is an integer number (211171261).

Almost surely, 2^422342521 is an apocalyptic number.

It is an amenable number.

422342521 is a deficient number, since it is larger than the sum of its proper divisors (1).

422342521 is an equidigital number, since it uses as much as digits as its factorization.

422342521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3840, while the sum is 25.

The square root of 422342521 is about 20550.9737238896. The cubic root of 422342521 is about 750.2769472026.

Adding to 422342521 its reverse (125243224), we get a palindrome (547585745).

The spelling of 422342521 in words is "four hundred twenty-two million, three hundred forty-two thousand, five hundred twenty-one".