42543856 has 20 divisors (see below), whose sum is σ = 84347032. Its totient is φ = 20776896.

The previous prime is 42543847. The next prime is 42543863. The reversal of 42543856 is 65834524.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30231 + ... + 31606.

Almost surely, 2^42543856 is an apocalyptic number.

It is an amenable number.

42543856 is a deficient number, since it is larger than the sum of its proper divisors (41803176).

42543856 is a wasteful number, since it uses less digits than its factorization.

42543856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61888 (or 61882 counting only the distinct ones).

The product of its digits is 115200, while the sum is 37.

The square root of 42543856 is about 6522.5651395751. The cubic root of 42543856 is about 349.0965980831.

The spelling of 42543856 in words is "forty-two million, five hundred forty-three thousand, eight hundred fifty-six".