420111143 has 4 divisors (see below), whose sum is σ = 422893488. Its totient is φ = 417328800.

The previous prime is 420111137. The next prime is 420111149. The reversal of 420111143 is 341111024.

It is a happy number.

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 (420111137) and next prime (420111149).

It is a cyclic number.

It is not a de Polignac number, because 420111143 - 2⁴ = 420111127 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 (420111149) 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, 1390946 + ... + 1391247.

It is an arithmetic number, because the mean of its divisors is an integer number (105723372).

Almost surely, 2^420111143 is an apocalyptic number.

420111143 is a deficient number, since it is larger than the sum of its proper divisors (2782345).

420111143 is a wasteful number, since it uses less digits than its factorization.

420111143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2782344.

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 420111143 is about 20496.6129640973. The cubic root of 420111143 is about 748.9532912881.

Adding to 420111143 its reverse (341111024), we get a palindrome (761222167).

The spelling of 420111143 in words is "four hundred twenty million, one hundred eleven thousand, one hundred forty-three".