420431201 has 2 divisors, whose sum is σ = 420431202. Its totient is φ = 420431200.

The previous prime is 420431197. The next prime is 420431239. The reversal of 420431201 is 102134024.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 399040576 + 21390625 = 19976^2 + 4625^2 .

It is a cyclic number.

It is not a de Polignac number, because 420431201 - 2² = 420431197 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 420431201.

It is not a weakly prime, because it can be changed into another prime (420431251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210215600 + 210215601.

It is an arithmetic number, because the mean of its divisors is an integer number (210215601).

Almost surely, 2^420431201 is an apocalyptic number.

It is an amenable number.

420431201 is a deficient number, since it is larger than the sum of its proper divisors (1).

420431201 is an equidigital number, since it uses as much as digits as its factorization.

420431201 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 420431201 is about 20504.4190602904. The cubic root of 420431201 is about 749.1434375141.

Adding to 420431201 its reverse (102134024), we get a palindrome (522565225).

The spelling of 420431201 in words is "four hundred twenty million, four hundred thirty-one thousand, two hundred one".