8021685 has 32 divisors (see below), whose sum is σ = 14775552. Its totient is φ = 3640320.

The previous prime is 8021681. The next prime is 8021729. The reversal of 8021685 is 5861208.

It is not a de Polignac number, because 8021685 - 2² = 8021681 is a prime.

It is an Ulam number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8021681) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 25147 + ... + 25463.

It is an arithmetic number, because the mean of its divisors is an integer number (461736).

Almost surely, 2^8021685 is an apocalyptic number.

It is an amenable number.

8021685 is a deficient number, since it is larger than the sum of its proper divisors (6753867).

8021685 is a wasteful number, since it uses less digits than its factorization.

8021685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 573.

The product of its (nonzero) digits is 3840, while the sum is 30.

The square root of 8021685 is about 2832.2579331692. The cubic root of 8021685 is about 200.1805453013.

The spelling of 8021685 in words is "eight million, twenty-one thousand, six hundred eighty-five".