420304441 has 2 divisors, whose sum is σ = 420304442. Its totient is φ = 420304440.

The previous prime is 420304439. The next prime is 420304459. The reversal of 420304441 is 144403024.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 282946041 + 137358400 = 16821^2 + 11720^2 .

It is a cyclic number.

It is not a de Polignac number, because 420304441 - 2¹ = 420304439 is a prime.

Together with 420304439, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (420304471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210152220 + 210152221.

It is an arithmetic number, because the mean of its divisors is an integer number (210152221).

Almost surely, 2^420304441 is an apocalyptic number.

It is an amenable number.

420304441 is a deficient number, since it is larger than the sum of its proper divisors (1).

420304441 is an equidigital number, since it uses as much as digits as its factorization.

420304441 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1536, while the sum is 22.

The square root of 420304441 is about 20501.3277862679. The cubic root of 420304441 is about 749.0681410350.

Adding to 420304441 its reverse (144403024), we get a palindrome (564707465).

The spelling of 420304441 in words is "four hundred twenty million, three hundred four thousand, four hundred forty-one".