Adding to 12000000 its reverse (21), we get a palindrome (12000021).
It is a super Niven number, because it is divisible the sum of any subset of its (nonzero) digits.
It is an unprimeable number.
Almost surely, 212000000 is an apocalyptic number.
12000000 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 12000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19960682).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
12000000 is an frugal number, since it uses more digits than its factorization.
12000000 is an evil number, because the sum of its binary digits is even.
The square root of 12000000 is about 3464.1016151378. The cubic root of 12000000 is about 228.9428485107.