42421143 has 4 divisors (see below), whose sum is σ = 56561528. Its totient is φ = 28280760.

The previous prime is 42421133. The next prime is 42421187. The reversal of 42421143 is 34112424.

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

It is not a de Polignac number, because 42421143 - 2⁸ = 42420887 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 (42421123) 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, 7070188 + ... + 7070193.

It is an arithmetic number, because the mean of its divisors is an integer number (14140382).

Almost surely, 2^42421143 is an apocalyptic number.

42421143 is a deficient number, since it is larger than the sum of its proper divisors (14140385).

42421143 is a wasteful number, since it uses less digits than its factorization.

42421143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14140384.

The product of its digits is 768, while the sum is 21.

The square root of 42421143 is about 6513.1515413047. The cubic root of 42421143 is about 348.7606314766.

Adding to 42421143 its reverse (34112424), we get a palindrome (76533567).

The spelling of 42421143 in words is "forty-two million, four hundred twenty-one thousand, one hundred forty-three".