8521841 has 2 divisors, whose sum is σ = 8521842. Its totient is φ = 8521840.

The previous prime is 8521831. The next prime is 8521867. The reversal of 8521841 is 1481258.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5424241 + 3097600 = 2329^2 + 1760^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8521841 is a prime.

It is not a weakly prime, because it can be changed into another prime (8521831) 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, 4260920 + 4260921.

It is an arithmetic number, because the mean of its divisors is an integer number (4260921).

Almost surely, 2^8521841 is an apocalyptic number.

It is an amenable number.

8521841 is a deficient number, since it is larger than the sum of its proper divisors (1).

8521841 is an equidigital number, since it uses as much as digits as its factorization.

8521841 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2560, while the sum is 29.

The square root of 8521841 is about 2919.2192449352. The cubic root of 8521841 is about 204.2574044728.

The spelling of 8521841 in words is "eight million, five hundred twenty-one thousand, eight hundred forty-one".