8528921 has 4 divisors (see below), whose sum is σ = 8727312. Its totient is φ = 8330532.

The previous prime is 8528911. The next prime is 8528969. The reversal of 8528921 is 1298258.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8528921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8528911) 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 3 ways as a sum of consecutive naturals, for example, 99131 + ... + 99216.

It is an arithmetic number, because the mean of its divisors is an integer number (2181828).

Almost surely, 2^8528921 is an apocalyptic number.

It is an amenable number.

8528921 is a deficient number, since it is larger than the sum of its proper divisors (198391).

8528921 is a wasteful number, since it uses less digits than its factorization.

8528921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198390.

The product of its digits is 11520, while the sum is 35.

The square root of 8528921 is about 2920.4316461784. The cubic root of 8528921 is about 204.3139549342.

It can be divided in two parts, 8528 and 921, that added together give a palindrome (9449).

The spelling of 8528921 in words is "eight million, five hundred twenty-eight thousand, nine hundred twenty-one".