It is a happy number.
999912 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.
It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 999912.
999912 is an untouchable number, because it is not equal to the sum of proper divisors of any number.
2999912 is an apocalyptic number.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 999912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1272240).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
999912 is a wasteful number, since it uses less digits than its factorization.
999912 is an evil number, because the sum of its binary digits is even.
The square root of 999912 is about 999.9559990320. The cubic root of 999912 is about 99.9970665806.
The spelling of 999912 in words is "nine hundred ninety-nine thousand, nine hundred twelve".