It is a happy number.
It is a sphenic number, since it is the product of 3 distinct primes.
It is a plaindrome in base 8.
It is a nialpdrome in base 15.
It is a congruent number.
It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 42423.
242423 is an apocalyptic number.
42423 is a wasteful number, since it uses less digits than its factorization.
42423 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 261.
The square root of 42423 is about 205.9684441850. The cubic root of 42423 is about 34.8765720441.
Adding to 42423 its reverse (32424), we get a palindrome (74847).
Subtracting from 42423 its reverse (32424), we obtain a palindrome (9999).
The spelling of 42423 in words is "forty-two thousand, four hundred twenty-three", and thus it is an iban number.