8521871 has 2 divisors, whose sum is σ = 8521872. Its totient is φ = 8521870.

The previous prime is 8521867. The next prime is 8521907. The reversal of 8521871 is 1781258.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 8521871 - 2² = 8521867 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8521831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4260935 + 4260936.

It is an arithmetic number, because the mean of its divisors is an integer number (4260936).

Almost surely, 2^8521871 is an apocalyptic number.

8521871 is a deficient number, since it is larger than the sum of its proper divisors (1).

8521871 is an equidigital number, since it uses as much as digits as its factorization.

8521871 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4480, while the sum is 32.

The square root of 8521871 is about 2919.2243832909. The cubic root of 8521871 is about 204.2576441595.

The spelling of 8521871 in words is "eight million, five hundred twenty-one thousand, eight hundred seventy-one".