Adding to 12000 its reverse (21), we get a palindrome (12021).
12000 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.
It is a tau number, because it is divible by the number of its divisors (48).
It is a super Niven number, because it is divisible the sum of any subset of its (nonzero) digits.
It is a congruent number.
12000 is an untouchable number, because it is not equal to the sum of proper divisors of any number.
212000 is an apocalyptic number.
12000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 12000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19656).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
12000 is an equidigital number, since it uses as much as digits as its factorization.
12000 is an odious number, because the sum of its binary digits is odd.
The square root of 12000 is about 109.5445115010. The cubic root of 12000 is about 22.8942848511.
The spelling of 12000 in words is "twelve thousand", and thus it is an iban number.