Adding to 16422 its reverse (22461), we get a palindrome (38883).
It is a plaindrome in base 9 and base 11.
It is a congruent number.
216422 is an apocalyptic number.
It is a practical number, because each smaller number is the sum of distinct divisors of 16422, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20736).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
16422 is a wasteful number, since it uses less digits than its factorization.
16422 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 52.
The square root of 16422 is about 128.1483515306. The cubic root of 16422 is about 25.4180374906.
The spelling of 16422 in words is "sixteen thousand, four hundred twenty-two".