It is a zygodrome in base 2.
It is a congruent number.
212400 is an apocalyptic number.
12400 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 12400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15376).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
12400 is a wasteful number, since it uses less digits than its factorization.
12400 is an odious number, because the sum of its binary digits is odd.
The square root of 12400 is about 111.3552872566. The cubic root of 12400 is about 23.1458905453.
Adding to 12400 its reverse (421), we get a palindrome (12821).
The spelling of 12400 in words is "twelve thousand, four hundred", and thus it is an iban number.