8521671 has 8 divisors (see below), whose sum is σ = 11960320. Its totient is φ = 5382072.

The previous prime is 8521649. The next prime is 8521687. The reversal of 8521671 is 1761258.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 8521671 - 2¹⁰ = 8520647 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8521631) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74695 + ... + 74808.

It is an arithmetic number, because the mean of its divisors is an integer number (1495040).

Almost surely, 2^8521671 is an apocalyptic number.

8521671 is a deficient number, since it is larger than the sum of its proper divisors (3438649).

8521671 is a wasteful number, since it uses less digits than its factorization.

8521671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149525.

The product of its digits is 3360, while the sum is 30.

The square root of 8521671 is about 2919.1901274155. The cubic root of 8521671 is about 204.2560462378.

The spelling of 8521671 in words is "eight million, five hundred twenty-one thousand, six hundred seventy-one".