420242111 has 4 divisors (see below), whose sum is σ = 423551232. Its totient is φ = 416932992.

The previous prime is 420242099. The next prime is 420242117. The reversal of 420242111 is 111242024.

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

It is a cyclic number.

It is not a de Polignac number, because 420242111 - 2⁶ = 420242047 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 420242111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420242117) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1654370 + ... + 1654623.

It is an arithmetic number, because the mean of its divisors is an integer number (105887808).

Almost surely, 2^420242111 is an apocalyptic number.

420242111 is a deficient number, since it is larger than the sum of its proper divisors (3309121).

420242111 is a wasteful number, since it uses less digits than its factorization.

420242111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3309120.

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 420242111 is about 20499.8075844628. The cubic root of 420242111 is about 749.0311109517.

Adding to 420242111 its reverse (111242024), we get a palindrome (531484135).

The spelling of 420242111 in words is "four hundred twenty million, two hundred forty-two thousand, one hundred eleven".