It is a happy number.
It is an unprimeable number.
2128100 is an apocalyptic number.
128100 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 128100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (215264).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
128100 is a wasteful number, since it uses less digits than its factorization.
128100 is an odious number, because the sum of its binary digits is odd.
The square root of 128100 is about 357.9106033635. The cubic root of 128100 is about 50.4099627571.
Adding to 128100 its reverse (1821), we get a palindrome (129921).
The spelling of 128100 in words is "one hundred twenty-eight thousand, one hundred".