420434530 has 8 divisors (see below), whose sum is σ = 756782172. Its totient is φ = 168173808.

The previous prime is 420434519. The next prime is 420434533. The reversal of 420434530 is 35434024.

It can be written as a sum of positive squares in 2 ways, for example, as 371448529 + 48986001 = 19273^2 + 6999^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 420434495 and 420434504.

It is not an unprimeable number, because it can be changed into a prime (420434533) 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 in 3 ways as a sum of consecutive naturals, for example, 21021717 + ... + 21021736.

Almost surely, 2^420434530 is an apocalyptic number.

420434530 is a deficient number, since it is larger than the sum of its proper divisors (336347642).

420434530 is a wasteful number, since it uses less digits than its factorization.

420434530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42043460.

The product of its (nonzero) digits is 5760, while the sum is 25.

The square root of 420434530 is about 20504.5002377527. The cubic root of 420434530 is about 749.1454147634.

Adding to 420434530 its reverse (35434024), we get a palindrome (455868554).

The spelling of 420434530 in words is "four hundred twenty million, four hundred thirty-four thousand, five hundred thirty".