8520241 has 2 divisors, whose sum is σ = 8520242. Its totient is φ = 8520240.

The previous prime is 8520191. The next prime is 8520269. The reversal of 8520241 is 1420258.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8433216 + 87025 = 2904^2 + 295^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8520241 is a prime.

It is equal to p₅₇₂₄₀₄ and since 8520241 and 572404 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (8520041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4260120 + 4260121.

It is an arithmetic number, because the mean of its divisors is an integer number (4260121).

Almost surely, 2^8520241 is an apocalyptic number.

It is an amenable number.

8520241 is a deficient number, since it is larger than the sum of its proper divisors (1).

8520241 is an equidigital number, since it uses as much as digits as its factorization.

8520241 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 640, while the sum is 22.

The square root of 8520241 is about 2918.9451861931. The cubic root of 8520241 is about 204.2446203689.

Adding to 8520241 its reverse (1420258), we get a palindrome (9940499).

The spelling of 8520241 in words is "eight million, five hundred twenty thousand, two hundred forty-one".