8040581 has 4 divisors (see below), whose sum is σ = 8257932. Its totient is φ = 7823232.

The previous prime is 8040559. The next prime is 8040583. The reversal of 8040581 is 1850408.

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 7022500 + 1018081 = 2650^2 + 1009^2 .

It is a cyclic number.

It is not a de Polignac number, because 8040581 - 2⁶ = 8040517 is a prime.

It is a super-2 number, since 2×8040581² = 129301885635122, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 8040581.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8040583) 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, 108620 + ... + 108693.

It is an arithmetic number, because the mean of its divisors is an integer number (2064483).

Almost surely, 2^8040581 is an apocalyptic number.

It is an amenable number.

8040581 is a deficient number, since it is larger than the sum of its proper divisors (217351).

8040581 is a wasteful number, since it uses less digits than its factorization.

8040581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217350.

The product of its (nonzero) digits is 1280, while the sum is 26.

The square root of 8040581 is about 2835.5918253515. The cubic root of 8040581 is about 200.3376047944.

Adding to 8040581 its reverse (1850408), we get a palindrome (9890989).

The spelling of 8040581 in words is "eight million, forty thousand, five hundred eighty-one".