4118581 has 8 divisors (see below), whose sum is σ = 4262840. Its totient is φ = 3976128.

The previous prime is 4118579. The next prime is 4118591. The reversal of 4118581 is 1858114.

It can be written as a sum of positive squares in 4 ways, for example, as 378225 + 3740356 = 615^2 + 1934^2 .

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 4118581 - 2¹ = 4118579 is a prime.

It is a super-2 number, since 2×4118581² = 33925418907122, 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 (4118501) 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, 5455 + ... + 6163.

It is an arithmetic number, because the mean of its divisors is an integer number (532855).

Almost surely, 2^4118581 is an apocalyptic number.

It is an amenable number.

4118581 is a deficient number, since it is larger than the sum of its proper divisors (144259).

4118581 is a wasteful number, since it uses less digits than its factorization.

4118581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 903.

The product of its digits is 1280, while the sum is 28.

The square root of 4118581 is about 2029.4287373544. The cubic root of 4118581 is about 160.2934847751.

The spelling of 4118581 in words is "four million, one hundred eighteen thousand, five hundred eighty-one".