6005581 has 12 divisors (see below), whose sum is σ = 6421012. Its totient is φ = 5612544.

The previous prime is 6005579. The next prime is 6005591. The reversal of 6005581 is 1855006.

It can be written as a sum of positive squares in 6 ways, for example, as 81225 + 5924356 = 285^2 + 2434^2 .

It is not a de Polignac number, because 6005581 - 2¹ = 6005579 is a prime.

It is a super-2 number, since 2×6005581² = 72134006295122, 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 (6005591) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 31021 + ... + 31213.

Almost surely, 2^6005581 is an apocalyptic number.

It is an amenable number.

6005581 is a deficient number, since it is larger than the sum of its proper divisors (415431).

6005581 is a wasteful number, since it uses less digits than its factorization.

6005581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 288 (or 259 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 25.

The square root of 6005581 is about 2450.6286948455. The cubic root of 6005581 is about 181.7683826569.

The spelling of 6005581 in words is "six million, five thousand, five hundred eighty-one".