8528021 has 2 divisors, whose sum is σ = 8528022. Its totient is φ = 8528020.

The previous prime is 8527991. The next prime is 8528029. The reversal of 8528021 is 1208258.

8528021 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8151025 + 376996 = 2855^2 + 614^2 .

It is a cyclic number.

It is not a de Polignac number, because 8528021 - 2¹⁴ = 8511637 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8528029) 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 as a sum of consecutive naturals, namely, 4264010 + 4264011.

It is an arithmetic number, because the mean of its divisors is an integer number (4264011).

Almost surely, 2^8528021 is an apocalyptic number.

It is an amenable number.

8528021 is a deficient number, since it is larger than the sum of its proper divisors (1).

8528021 is an equidigital number, since it uses as much as digits as its factorization.

8528021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1280, while the sum is 26.

The square root of 8528021 is about 2920.2775553019. The cubic root of 8528021 is about 204.3067680529.

The spelling of 8528021 in words is "eight million, five hundred twenty-eight thousand, twenty-one".