420405111 has 12 divisors (see below), whose sum is σ = 694002192. Its totient is φ = 240231456.

The previous prime is 420405079. The next prime is 420405119. The reversal of 420405111 is 111504024.

It is not a de Polignac number, because 420405111 - 2⁵ = 420405079 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420405119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3336486 + ... + 3336611.

It is an arithmetic number, because the mean of its divisors is an integer number (57833516).

Almost surely, 2^420405111 is an apocalyptic number.

420405111 is a deficient number, since it is larger than the sum of its proper divisors (273597081).

420405111 is a wasteful number, since it uses less digits than its factorization.

420405111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6673110 (or 6673107 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

The square root of 420405111 is about 20503.7828460994. The cubic root of 420405111 is about 749.1279410773.

Adding to 420405111 its reverse (111504024), we get a palindrome (531909135).

The spelling of 420405111 in words is "four hundred twenty million, four hundred five thousand, one hundred eleven".