42043791 has 4 divisors (see below), whose sum is σ = 56058392. Its totient is φ = 28029192.

The previous prime is 42043769. The next prime is 42043817. The reversal of 42043791 is 19734024.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 42043791 - 2⁹ = 42043279 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 (42043711) by changing a digit.

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, 7007296 + ... + 7007301.

It is an arithmetic number, because the mean of its divisors is an integer number (14014598).

Almost surely, 2^42043791 is an apocalyptic number.

42043791 is a deficient number, since it is larger than the sum of its proper divisors (14014601).

42043791 is a wasteful number, since it uses less digits than its factorization.

42043791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14014600.

The product of its (nonzero) digits is 6048, while the sum is 30.

The square root of 42043791 is about 6484.1183672108. The cubic root of 42043791 is about 347.7234310047.

The spelling of 42043791 in words is "forty-two million, forty-three thousand, seven hundred ninety-one".