8521100 has 108 divisors (see below), whose sum is σ = 22561056. Its totient is φ = 2782080.

The previous prime is 8521091. The next prime is 8521103. The reversal of 8521100 is 11258.

It is a nialpdrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (8521103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 181277 + ... + 181323.

Almost surely, 2^8521100 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 8521100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11280528).

8521100 is an abundant number, since it is smaller than the sum of its proper divisors (14039956).

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

8521100 is a wasteful number, since it uses less digits than its factorization.

8521100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112 (or 98 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 17.

The square root of 8521100 is about 2919.0923246790. The cubic root of 8521100 is about 204.2514840336.

Adding to 8521100 its reverse (11258), we get a palindrome (8532358).

The spelling of 8521100 in words is "eight million, five hundred twenty-one thousand, one hundred".