It is a happy number.
It is a tau number, because it is divible by the number of its divisors (96).
It is a congruent number.
Almost surely, 212255840 is an apocalyptic number.
12255840 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 12255840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21455280).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
12255840 is a wasteful number, since it uses less digits than its factorization.
12255840 is an odious number, because the sum of its binary digits is odd.
The square root of 12255840 is about 3500.8341863047. The cubic root of 12255840 is about 230.5584413654.
The spelling of 12255840 in words is "twelve million, two hundred fifty-five thousand, eight hundred forty".