8259521 has 2 divisors, whose sum is σ = 8259522. Its totient is φ = 8259520.

The previous prime is 8259499. The next prime is 8259527. The reversal of 8259521 is 1259528.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6948496 + 1311025 = 2636^2 + 1145^2 .

It is a cyclic number.

It is not a de Polignac number, because 8259521 - 2¹⁸ = 7997377 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (8259527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4129760 + 4129761.

It is an arithmetic number, because the mean of its divisors is an integer number (4129761).

Almost surely, 2^8259521 is an apocalyptic number.

It is an amenable number.

8259521 is a deficient number, since it is larger than the sum of its proper divisors (1).

8259521 is an equidigital number, since it uses as much as digits as its factorization.

8259521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7200, while the sum is 32.

The square root of 8259521 is about 2873.9382387240. The cubic root of 8259521 is about 202.1397017468.

The spelling of 8259521 in words is "eight million, two hundred fifty-nine thousand, five hundred twenty-one".