420320441 has 2 divisors, whose sum is σ = 420320442. Its totient is φ = 420320440.

The previous prime is 420320419. The next prime is 420320449. The reversal of 420320441 is 144023024.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 399160441 + 21160000 = 19979^2 + 4600^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-420320441 is a prime.

It is not a weakly prime, because it can be changed into another prime (420320449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210160220 + 210160221.

It is an arithmetic number, because the mean of its divisors is an integer number (210160221).

Almost surely, 2^420320441 is an apocalyptic number.

It is an amenable number.

420320441 is a deficient number, since it is larger than the sum of its proper divisors (1).

420320441 is an equidigital number, since it uses as much as digits as its factorization.

420320441 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 420320441 is about 20501.7180011822. The cubic root of 420320441 is about 749.0776460010.

Adding to 420320441 its reverse (144023024), we get a palindrome (564343465).

The spelling of 420320441 in words is "four hundred twenty million, three hundred twenty thousand, four hundred forty-one".