42543143 has 4 divisors (see below), whose sum is σ = 42705168. Its totient is φ = 42381120.

The previous prime is 42543121. The next prime is 42543187. The reversal of 42543143 is 34134524.

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 42543143 - 2⁶ = 42543079 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 (42543113) 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, 80618 + ... + 81143.

It is an arithmetic number, because the mean of its divisors is an integer number (10676292).

Almost surely, 2^42543143 is an apocalyptic number.

42543143 is a deficient number, since it is larger than the sum of its proper divisors (162025).

42543143 is a wasteful number, since it uses less digits than its factorization.

42543143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162024.

The product of its digits is 5760, while the sum is 26.

The square root of 42543143 is about 6522.5104829352. The cubic root of 42543143 is about 349.0946478816.

Adding to 42543143 its reverse (34134524), we get a palindrome (76677667).

The spelling of 42543143 in words is "forty-two million, five hundred forty-three thousand, one hundred forty-three".