8521120 has 48 divisors (see below), whose sum is σ = 21198240. Its totient is φ = 3227904.

The previous prime is 8521111. The next prime is 8521129. The reversal of 8521120 is 211258.

It is an interprime number because it is at equal distance from previous prime (8521111) and next prime (8521129).

It is a Harshad number since it is a multiple of its sum of digits (19).

It is not an unprimeable number, because it can be changed into a prime (8521129) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1639 + ... + 4441.

It is an arithmetic number, because the mean of its divisors is an integer number (441630).

Almost surely, 2^8521120 is an apocalyptic number.

8521120 is a gapful number since it is divisible by the number (80) 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 8521120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10599120).

8521120 is an abundant number, since it is smaller than the sum of its proper divisors (12677120).

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

8521120 is a wasteful number, since it uses less digits than its factorization.

8521120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2837 (or 2829 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 19.

The square root of 8521120 is about 2919.0957503994. The cubic root of 8521120 is about 204.2516438341.

Adding to 8521120 its reverse (211258), we get a palindrome (8732378).

The spelling of 8521120 in words is "eight million, five hundred twenty-one thousand, one hundred twenty".