421423111 has 4 divisors (see below), whose sum is σ = 421507800. Its totient is φ = 421338424.

The previous prime is 421423109. The next prime is 421423117. The reversal of 421423111 is 111324124.

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 421423111 - 2¹ = 421423109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421423117) 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, 34381 + ... + 44998.

It is an arithmetic number, because the mean of its divisors is an integer number (105376950).

Almost surely, 2^421423111 is an apocalyptic number.

421423111 is a deficient number, since it is larger than the sum of its proper divisors (84689).

421423111 is an equidigital number, since it uses as much as digits as its factorization.

421423111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84688.

The product of its digits is 192, while the sum is 19.

The square root of 421423111 is about 20528.5925235999. The cubic root of 421423111 is about 749.7321182565.

Adding to 421423111 its reverse (111324124), we get a palindrome (532747235).

The spelling of 421423111 in words is "four hundred twenty-one million, four hundred twenty-three thousand, one hundred eleven".