430342021 has 2 divisors, whose sum is σ = 430342022. Its totient is φ = 430342020.

The previous prime is 430342013. The next prime is 430342043. The reversal of 430342021 is 120243034.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 324540225 + 105801796 = 18015^2 + 10286^2 .

It is a cyclic number.

It is not a de Polignac number, because 430342021 - 2³ = 430342013 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 430342021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (430342051) 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, 215171010 + 215171011.

It is an arithmetic number, because the mean of its divisors is an integer number (215171011).

Almost surely, 2^430342021 is an apocalyptic number.

It is an amenable number.

430342021 is a deficient number, since it is larger than the sum of its proper divisors (1).

430342021 is an equidigital number, since it uses as much as digits as its factorization.

430342021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 430342021 is about 20744.6865727106. The cubic root of 430342021 is about 754.9842962685.

Adding to 430342021 its reverse (120243034), we get a palindrome (550585055).

The spelling of 430342021 in words is "four hundred thirty million, three hundred forty-two thousand, twenty-one".