3683581 has 8 divisors (see below), whose sum is σ = 4037184. Its totient is φ = 3333120.

The previous prime is 3683569. The next prime is 3683597. The reversal of 3683581 is 1853863.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 3683581 - 2⁷ = 3683453 is a prime.

It is a super-2 number, since 2×3683581² = 27137537967122, 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 (3683081) 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 7 ways as a sum of consecutive naturals, for example, 2176 + ... + 3478.

It is an arithmetic number, because the mean of its divisors is an integer number (504648).

Almost surely, 2^3683581 is an apocalyptic number.

It is an amenable number.

3683581 is a deficient number, since it is larger than the sum of its proper divisors (353603).

3683581 is a wasteful number, since it uses less digits than its factorization.

3683581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1571.

The product of its digits is 17280, while the sum is 34.

The square root of 3683581 is about 1919.2657450181. The cubic root of 3683581 is about 154.4389148379.

The spelling of 3683581 in words is "three million, six hundred eighty-three thousand, five hundred eighty-one".