420111305 has 4 divisors (see below), whose sum is σ = 504133572. Its totient is φ = 336089040.

The previous prime is 420111281. The next prime is 420111319. The reversal of 420111305 is 503111024.

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

It can be written as a sum of positive squares in 2 ways, for example, as 62031376 + 358079929 = 7876^2 + 18923^2 .

It is not a de Polignac number, because 420111305 - 2²⁰ = 419062729 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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, 42011126 + ... + 42011135.

It is an arithmetic number, because the mean of its divisors is an integer number (126033393).

Almost surely, 2^420111305 is an apocalyptic number.

It is an amenable number.

420111305 is a deficient number, since it is larger than the sum of its proper divisors (84022267).

420111305 is an equidigital number, since it uses as much as digits as its factorization.

420111305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84022266.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 420111305 is about 20496.6169159693. The cubic root of 420111305 is about 748.9533875566.

Adding to 420111305 its reverse (503111024), we get a palindrome (923222329).

The spelling of 420111305 in words is "four hundred twenty million, one hundred eleven thousand, three hundred five".