8021287 has 8 divisors (see below), whose sum is σ = 8500400. Its totient is φ = 7547904.

The previous prime is 8021269. The next prime is 8021291. The reversal of 8021287 is 7821208.

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

It is a 10-Lehmer number, since φ(8021287) divides (8021287-1)¹⁰.

It is a cyclic number.

It is not a de Polignac number, because 8021287 - 2⁷ = 8021159 is a prime.

It is a deceptive number, since it divides R_8021286.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8021257) 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, 1639 + ... + 4327.

It is an arithmetic number, because the mean of its divisors is an integer number (1062550).

Almost surely, 2^8021287 is an apocalyptic number.

8021287 is a deficient number, since it is larger than the sum of its proper divisors (479113).

8021287 is a wasteful number, since it uses less digits than its factorization.

8021287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2865.

The product of its (nonzero) digits is 1792, while the sum is 28.

The square root of 8021287 is about 2832.1876703354. The cubic root of 8021287 is about 200.1772345598.

The spelling of 8021287 in words is "eight million, twenty-one thousand, two hundred eighty-seven".