8004481 has 4 divisors (see below), whose sum is σ = 8135764. Its totient is φ = 7873200.

The previous prime is 8004463. The next prime is 8004487. The reversal of 8004481 is 1844008.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4064256 + 3940225 = 2016^2 + 1985^2 .

It is a 9-Lehmer number, since φ(8004481) divides (8004481-1)⁹.

It is a cyclic number.

It is not a de Polignac number, because 8004481 - 2⁵ = 8004449 is a prime.

It is a super-2 number, since 2×8004481² = 128143432158722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8004487) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65550 + ... + 65671.

It is an arithmetic number, because the mean of its divisors is an integer number (2033941).

Almost surely, 2^8004481 is an apocalyptic number.

It is an amenable number.

8004481 is a deficient number, since it is larger than the sum of its proper divisors (131283).

8004481 is a wasteful number, since it uses less digits than its factorization.

8004481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131282.

The product of its (nonzero) digits is 1024, while the sum is 25.

The square root of 8004481 is about 2829.2191502250. The cubic root of 8004481 is about 200.0373346968.

Adding to 8004481 its reverse (1844008), we get a palindrome (9848489).

The spelling of 8004481 in words is "eight million, four thousand, four hundred eighty-one".