It is a happy number.
It is a tau number, because it is divible by the number of its divisors (42).
It is an ABA number since it can be written as A⋅BA, here for A=2, B=189.
It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 71442.
71442 is an untouchable number, because it is not equal to the sum of proper divisors of any number.
271442 is an apocalyptic number.
It is a practical number, because each smaller number is the sum of distinct divisors of 71442
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
71442 is an equidigital number, since it uses as much as digits as its factorization.
71442 is an odious number, because the sum of its binary digits is odd.
The square root of 71442 is about 267.2863632885. The cubic root of 71442 is about 41.4939266285.
Multiplying 71442 by its sum of digits (18), we get a square (1285956 = 11342).
71442 divided by its sum of digits (18) gives a square (3969 = 632).
Multiplying 71442 by its product of digits (224), we get a cube (16003008 = 2523).
Adding to 71442 its reverse (24417), we get a palindrome (95859).
The spelling of 71442 in words is "seventy-one thousand, four hundred forty-two", and thus it is an iban number.