8021281 has 8 divisors (see below), whose sum is σ = 8483328. Its totient is φ = 7572000.

The previous prime is 8021269. The next prime is 8021291. The reversal of 8021281 is 1821208.

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 8021281 - 2¹¹ = 8019233 is a prime.

It is a super-2 number, since 2×8021281² = 128681897761922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8021231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1885 + ... + 4426.

It is an arithmetic number, because the mean of its divisors is an integer number (1060416).

Almost surely, 2^8021281 is an apocalyptic number.

It is an amenable number.

8021281 is a deficient number, since it is larger than the sum of its proper divisors (462047).

8021281 is a wasteful number, since it uses less digits than its factorization.

8021281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6383.

The product of its (nonzero) digits is 256, while the sum is 22.

The square root of 8021281 is about 2832.1866110834. The cubic root of 8021281 is about 200.1771846483.

Adding to 8021281 its reverse (1821208), we get a palindrome (9842489).

The spelling of 8021281 in words is "eight million, twenty-one thousand, two hundred eighty-one".