84100 has 27 divisors (see below), whose sum is σ = 189007.
Its totient is φ = 32480.
The previous prime is 84089. The next prime is 84121. The reversal of 84100 is 148.
Adding to 84100 its reverse (148), we get a palindrome (84248).
84100 = T289 + T290.
The square root of 84100 is 290.
It is a perfect power (a square), and thus also a powerful number.
84100 is nontrivially palindromic in base 12.
It can be written as a sum of positive squares in 4 ways, for example, as 1156 + 82944 = 34^2 + 288^2
It is a Duffinian number.
It is a nialpdrome in base 10.
It is an unprimeable number.
It is a pernicious number, because its binary representation contains a prime number (5) of ones.
It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 2886 + ... + 2914.
284100 is an apocalyptic number.
84100 is the 290-th square number.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 84100
84100 is an abundant number, since it is smaller than the sum of its proper divisors (104907).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
84100 is a wasteful number, since it uses less digits than its factorization.
84100 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 72 (or 36 counting only the distinct ones).
The product of its (nonzero) digits is 32, while the sum is 13.
The cubic root of 84100 is about 43.8125635512.
The spelling of 84100 in words is "eighty-four thousand, one hundred".