84021100 has 36 divisors (see below), whose sum is σ = 183582000. Its totient is φ = 33376960.

The previous prime is 84021079. The next prime is 84021103. The reversal of 84021100 is 112048.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (84021103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12081 + ... + 17719.

It is an arithmetic number, because the mean of its divisors is an integer number (5099500).

Almost surely, 2^84021100 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 84021100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91791000).

84021100 is an abundant number, since it is smaller than the sum of its proper divisors (99560900).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

84021100 is a wasteful number, since it uses less digits than its factorization.

84021100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5802 (or 5795 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

The square root of 84021100 is about 9166.3024170055. The cubic root of 84021100 is about 437.9885807021.

Adding to 84021100 its reverse (112048), we get a palindrome (84133148).

The spelling of 84021100 in words is "eighty-four million, twenty-one thousand, one hundred".