8525520 has 80 divisors (see below), whose sum is σ = 29373120. Its totient is φ = 2272896.

The previous prime is 8525501. The next prime is 8525521. The reversal of 8525520 is 255258.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8525521) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 187 + ... + 4133.

It is an arithmetic number, because the mean of its divisors is an integer number (367164).

Almost surely, 2^8525520 is an apocalyptic number.

8525520 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 8525520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14686560).

8525520 is an abundant number, since it is smaller than the sum of its proper divisors (20847600).

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

8525520 is a wasteful number, since it uses less digits than its factorization.

8525520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3969 (or 3957 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 27.

The square root of 8525520 is about 2919.8493111803. The cubic root of 8525520 is about 204.2867938531.

It can be divided in two parts, 8525 and 520, that added together give a triangular number (9045 = T₁₃₄).

The spelling of 8525520 in words is "eight million, five hundred twenty-five thousand, five hundred twenty".