8112521 has 2 divisors, whose sum is σ = 8112522. Its totient is φ = 8112520.

The previous prime is 8112497. The next prime is 8112527. The reversal of 8112521 is 1252118.

It is a happy number.

8112521 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., 8094025 + 18496 = 2845^2 + 136^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8112521 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 8112493 and 8112502.

It is not a weakly prime, because it can be changed into another prime (8112527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4056260 + 4056261.

It is an arithmetic number, because the mean of its divisors is an integer number (4056261).

Almost surely, 2^8112521 is an apocalyptic number.

It is an amenable number.

8112521 is a deficient number, since it is larger than the sum of its proper divisors (1).

8112521 is an equidigital number, since it uses as much as digits as its factorization.

8112521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 160, while the sum is 20.

The square root of 8112521 is about 2848.2487602034. The cubic root of 8112521 is about 200.9333128607.

Adding to 8112521 its reverse (1252118), we get a palindrome (9364639).

The spelling of 8112521 in words is "eight million, one hundred twelve thousand, five hundred twenty-one".