42422143 has 4 divisors (see below), whose sum is σ = 44266608. Its totient is φ = 40577680.

The previous prime is 42422141. The next prime is 42422147. The reversal of 42422143 is 34122424.

It is a happy number.

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 42422143 - 2¹ = 42422141 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 (42422141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 922198 + ... + 922243.

It is an arithmetic number, because the mean of its divisors is an integer number (11066652).

Almost surely, 2^42422143 is an apocalyptic number.

42422143 is a deficient number, since it is larger than the sum of its proper divisors (1844465).

42422143 is a wasteful number, since it uses less digits than its factorization.

42422143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1844464.

The product of its digits is 1536, while the sum is 22.

The square root of 42422143 is about 6513.2283086040. The cubic root of 42422143 is about 348.7633719174.

Adding to 42422143 its reverse (34122424), we get a palindrome (76544567).

The spelling of 42422143 in words is "forty-two million, four hundred twenty-two thousand, one hundred forty-three".