8285521 has 8 divisors (see below), whose sum is σ = 8571584. Its totient is φ = 8002800.

The previous prime is 8285513. The next prime is 8285527. The reversal of 8285521 is 1255828.

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

It is a cyclic number.

It is not a de Polignac number, because 8285521 - 2³ = 8285513 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 (8285527) 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, 4846 + ... + 6328.

It is an arithmetic number, because the mean of its divisors is an integer number (1071448).

Almost surely, 2^8285521 is an apocalyptic number.

It is an amenable number.

8285521 is a deficient number, since it is larger than the sum of its proper divisors (286063).

8285521 is a wasteful number, since it uses less digits than its factorization.

8285521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1671.

The product of its digits is 6400, while the sum is 31.

The square root of 8285521 is about 2878.4580941886. The cubic root of 8285521 is about 202.3515835724.

The spelling of 8285521 in words is "eight million, two hundred eighty-five thousand, five hundred twenty-one".