420441811 has 2 divisors, whose sum is σ = 420441812. Its totient is φ = 420441810.

The previous prime is 420441803. The next prime is 420441851. The reversal of 420441811 is 118144024.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 420441811 - 2³ = 420441803 is a prime.

It is not a weakly prime, because it can be changed into another prime (420441851) 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, 210220905 + 210220906.

It is an arithmetic number, because the mean of its divisors is an integer number (210220906).

Almost surely, 2^420441811 is an apocalyptic number.

420441811 is a deficient number, since it is larger than the sum of its proper divisors (1).

420441811 is an equidigital number, since it uses as much as digits as its factorization.

420441811 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1024, while the sum is 25.

The square root of 420441811 is about 20504.6777833742. The cubic root of 420441811 is about 749.1497392546.

Adding to 420441811 its reverse (118144024), we get a palindrome (538585835).

The spelling of 420441811 in words is "four hundred twenty million, four hundred forty-one thousand, eight hundred eleven".