8005281 has 4 divisors (see below), whose sum is σ = 10673712. Its totient is φ = 5336852.

The previous prime is 8005271. The next prime is 8005301. The reversal of 8005281 is 1825008.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 8005281 - 2¹⁰ = 8004257 is a prime.

It is a super-2 number, since 2×8005281² = 128169047777922, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (8005211) 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 3 ways as a sum of consecutive naturals, for example, 1334211 + ... + 1334216.

It is an arithmetic number, because the mean of its divisors is an integer number (2668428).

Almost surely, 2^8005281 is an apocalyptic number.

It is an amenable number.

8005281 is a deficient number, since it is larger than the sum of its proper divisors (2668431).

8005281 is a wasteful number, since it uses less digits than its factorization.

8005281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2668430.

The product of its (nonzero) digits is 640, while the sum is 24.

The square root of 8005281 is about 2829.3605284587. The cubic root of 8005281 is about 200.0439986532.

The spelling of 8005281 in words is "eight million, five thousand, two hundred eighty-one".