420435305 has 4 divisors (see below), whose sum is σ = 504522372. Its totient is φ = 336348240.

The previous prime is 420435293. The next prime is 420435317. The reversal of 420435305 is 503534024.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (420435293) and next prime (420435317).

It can be written as a sum of positive squares in 2 ways, for example, as 271326784 + 149108521 = 16472^2 + 12211^2 .

It is not a de Polignac number, because 420435305 - 2⁴ = 420435289 is a prime.

It is a super-3 number, since 3×420435305³ (a number of 27 digits) contains 333 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42043526 + ... + 42043535.

It is an arithmetic number, because the mean of its divisors is an integer number (126130593).

Almost surely, 2^420435305 is an apocalyptic number.

It is an amenable number.

420435305 is a deficient number, since it is larger than the sum of its proper divisors (84087067).

420435305 is an equidigital number, since it uses as much as digits as its factorization.

420435305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84087066.

The product of its (nonzero) digits is 7200, while the sum is 26.

The square root of 420435305 is about 20504.5191360344. The cubic root of 420435305 is about 749.1458750708.

Adding to 420435305 its reverse (503534024), we get a palindrome (923969329).

The spelling of 420435305 in words is "four hundred twenty million, four hundred thirty-five thousand, three hundred five".