42423123 has 4 divisors (see below), whose sum is σ = 56564168. Its totient is φ = 28282080.

The previous prime is 42423119. The next prime is 42423133. The reversal of 42423123 is 32132424.

42423123 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 not a de Polignac number, because 42423123 - 2² = 42423119 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 42423123.

It is not an unprimeable number, because it can be changed into a prime (42423113) 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, 7070518 + ... + 7070523.

It is an arithmetic number, because the mean of its divisors is an integer number (14141042).

Almost surely, 2^42423123 is an apocalyptic number.

42423123 is a deficient number, since it is larger than the sum of its proper divisors (14141045).

42423123 is a wasteful number, since it uses less digits than its factorization.

42423123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14141044.

The product of its digits is 1152, while the sum is 21.

The square root of 42423123 is about 6513.3035396794. The cubic root of 42423123 is about 348.7660575076.

Adding to 42423123 its reverse (32132424), we get a palindrome (74555547).

The spelling of 42423123 in words is "forty-two million, four hundred twenty-three thousand, one hundred twenty-three".