8001581 has 8 divisors (see below), whose sum is σ = 9229440. Its totient is φ = 6794928.

The previous prime is 8001571. The next prime is 8001589. The reversal of 8001581 is 1851008.

8001581 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 8001581 - 2⁶ = 8001517 is a prime.

It is a super-2 number, since 2×8001581² = 128050596999122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8001589) 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, 4481 + ... + 6006.

It is an arithmetic number, because the mean of its divisors is an integer number (1153680).

Almost surely, 2^8001581 is an apocalyptic number.

It is an amenable number.

8001581 is a deficient number, since it is larger than the sum of its proper divisors (1227859).

8001581 is a wasteful number, since it uses less digits than its factorization.

8001581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10603.

The product of its (nonzero) digits is 320, while the sum is 23.

The square root of 8001581 is about 2828.7065948946. The cubic root of 8001581 is about 200.0131741322.

Adding to 8001581 its reverse (1851008), we get a palindrome (9852589).

The spelling of 8001581 in words is "eight million, one thousand, five hundred eighty-one".