42543423 has 12 divisors (see below), whose sum is σ = 66178840. Its totient is φ = 26180496.

The previous prime is 42543421. The next prime is 42543427. The reversal of 42543423 is 32434524.

42543423 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 42543423 - 2¹ = 42543421 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42543421) 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 11 ways as a sum of consecutive naturals, for example, 181693 + ... + 181926.

Almost surely, 2^42543423 is an apocalyptic number.

42543423 is a deficient number, since it is larger than the sum of its proper divisors (23635417).

42543423 is a wasteful number, since it uses less digits than its factorization.

42543423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 363638 (or 363635 counting only the distinct ones).

The product of its digits is 11520, while the sum is 27.

The square root of 42543423 is about 6522.5319470279. The cubic root of 42543423 is about 349.0954137417.

Adding to 42543423 its reverse (32434524), we get a palindrome (74977947).

The spelling of 42543423 in words is "forty-two million, five hundred forty-three thousand, four hundred twenty-three".