8520505 has 16 divisors (see below), whose sum is σ = 12063744. Its totient is φ = 5653440.

The previous prime is 8520503. The next prime is 8520509. The reversal of 8520505 is 5050258.

It is not a de Polignac number, because 8520505 - 2¹ = 8520503 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 8520505.

It is not an unprimeable number, because it can be changed into a prime (8520503) 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, 2842 + ... + 5011.

It is an arithmetic number, because the mean of its divisors is an integer number (753984).

Almost surely, 2^8520505 is an apocalyptic number.

It is an amenable number.

8520505 is a deficient number, since it is larger than the sum of its proper divisors (3543239).

8520505 is a wasteful number, since it uses less digits than its factorization.

8520505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7896.

The product of its (nonzero) digits is 2000, while the sum is 25.

The square root of 8520505 is about 2918.9904076581. The cubic root of 8520505 is about 204.2467298563.

It can be divided in two parts, 8520 and 505, that added together give a square (9025 = 95²).

The spelling of 8520505 in words is "eight million, five hundred twenty thousand, five hundred five".