42839543 has 8 divisors (see below), whose sum is σ = 43378368. Its totient is φ = 42303744.

The previous prime is 42839479. The next prime is 42839557. The reversal of 42839543 is 34593824.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 42839543 - 2⁶ = 42839479 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42839497 and 42839506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42839843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40955 + ... + 41987.

It is an arithmetic number, because the mean of its divisors is an integer number (5422296).

Almost surely, 2^42839543 is an apocalyptic number.

42839543 is a deficient number, since it is larger than the sum of its proper divisors (538825).

42839543 is a wasteful number, since it uses less digits than its factorization.

42839543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1513.

The product of its digits is 103680, while the sum is 38.

The square root of 42839543 is about 6545.1923577539. The cubic root of 42839543 is about 349.9034917588.

The spelling of 42839543 in words is "forty-two million, eight hundred thirty-nine thousand, five hundred forty-three".