It is a happy number.
It is a nialpdrome in base 16.
It is a zygodrome in base 16.
17442 is an untouchable number, because it is not equal to the sum of proper divisors of any number.
217442 is an apocalyptic number.
17442 is the 108-th pentagonal number.
It is a practical number, because each smaller number is the sum of distinct divisors of 17442, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21600).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
17442 is a wasteful number, since it uses less digits than its factorization.
17442 is an evil number, because the sum of its binary digits is even.
The square root of 17442 is about 132.0681642183. The cubic root of 17442 is about 25.9337564152.
Subtracting from 17442 its sum of digits (18), we obtain a square (17424 = 1322).
17442 divided by its sum of digits (18) gives a palindrome (969).
The spelling of 17442 in words is "seventeen thousand, four hundred forty-two", and thus it is an iban number.