8573821 has 8 divisors (see below), whose sum is σ = 9021600. Its totient is φ = 8136240.

The previous prime is 8573809. The next prime is 8573827. The reversal of 8573821 is 1283758.

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

It is not a de Polignac number, because 8573821 - 2⁹ = 8573309 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 (8573827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 795 + ... + 4216.

It is an arithmetic number, because the mean of its divisors is an integer number (1127700).

Almost surely, 2^8573821 is an apocalyptic number.

It is an amenable number.

8573821 is a deficient number, since it is larger than the sum of its proper divisors (447779).

8573821 is a wasteful number, since it uses less digits than its factorization.

8573821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5099.

The product of its digits is 13440, while the sum is 34.

The square root of 8573821 is about 2928.1087753019. The cubic root of 8573821 is about 204.6718605186.

The spelling of 8573821 in words is "eight million, five hundred seventy-three thousand, eight hundred twenty-one".