42872543 has 4 divisors (see below), whose sum is σ = 48997200. Its totient is φ = 36747888.

The previous prime is 42872513. The next prime is 42872567. The reversal of 42872543 is 34527824.

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 42872543 - 2²⁰ = 41823967 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42872513) 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, 3062318 + ... + 3062331.

It is an arithmetic number, because the mean of its divisors is an integer number (12249300).

Almost surely, 2^42872543 is an apocalyptic number.

42872543 is a deficient number, since it is larger than the sum of its proper divisors (6124657).

42872543 is an equidigital number, since it uses as much as digits as its factorization.

42872543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6124656.

The product of its digits is 53760, while the sum is 35.

The square root of 42872543 is about 6547.7128067746. The cubic root of 42872543 is about 349.9933141580.

The spelling of 42872543 in words is "forty-two million, eight hundred seventy-two thousand, five hundred forty-three".