42040423 has 8 divisors (see below), whose sum is σ = 42866928. Its totient is φ = 41219904.

The previous prime is 42040421. The next prime is 42040447. The reversal of 42040423 is 32404024.

42040423 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 42040423 - 2¹ = 42040421 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42040423.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42040421) 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 7 ways as a sum of consecutive naturals, for example, 14265 + ... + 16957.

It is an arithmetic number, because the mean of its divisors is an integer number (5358366).

Almost surely, 2^42040423 is an apocalyptic number.

42040423 is a deficient number, since it is larger than the sum of its proper divisors (826505).

42040423 is a wasteful number, since it uses less digits than its factorization.

42040423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2993.

The product of its (nonzero) digits is 768, while the sum is 19.

The square root of 42040423 is about 6483.8586505259. The cubic root of 42040423 is about 347.7141457352.

Adding to 42040423 its reverse (32404024), we get a palindrome (74444447).

The spelling of 42040423 in words is "forty-two million, forty thousand, four hundred twenty-three".