420432043 has 2 divisors, whose sum is σ = 420432044. Its totient is φ = 420432042.

The previous prime is 420432041. The next prime is 420432079. The reversal of 420432043 is 340234024.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 420432043 - 2¹ = 420432041 is a prime.

Together with 420432041, it forms a pair of twin primes.

It is equal to p_22366201 and since 420432043 and 22366201 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (420432041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210216021 + 210216022.

It is an arithmetic number, because the mean of its divisors is an integer number (210216022).

Almost surely, 2^420432043 is an apocalyptic number.

420432043 is a deficient number, since it is larger than the sum of its proper divisors (1).

420432043 is an equidigital number, since it uses as much as digits as its factorization.

420432043 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2304, while the sum is 22.

The square root of 420432043 is about 20504.4395924395. The cubic root of 420432043 is about 749.1439376184.

Adding to 420432043 its reverse (340234024), we get a palindrome (760666067).

The spelling of 420432043 in words is "four hundred twenty million, four hundred thirty-two thousand, forty-three".