42543679 has 4 divisors (see below), whose sum is σ = 44782840. Its totient is φ = 40304520.

The previous prime is 42543671. The next prime is 42543689. The reversal of 42543679 is 97634524.

It is a happy number.

42543679 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 42543679 - 2³ = 42543671 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 (42543671) 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 3 ways as a sum of consecutive naturals, for example, 1119552 + ... + 1119589.

It is an arithmetic number, because the mean of its divisors is an integer number (11195710).

Almost surely, 2^42543679 is an apocalyptic number.

42543679 is a deficient number, since it is larger than the sum of its proper divisors (2239161).

42543679 is a wasteful number, since it uses less digits than its factorization.

42543679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2239160.

The product of its digits is 181440, while the sum is 40.

The square root of 42543679 is about 6522.5515712794. The cubic root of 42543679 is about 349.0961139537.

The spelling of 42543679 in words is "forty-two million, five hundred forty-three thousand, six hundred seventy-nine".