4418681 has 4 divisors (see below), whose sum is σ = 4427172. Its totient is φ = 4410192.

The previous prime is 4418677. The next prime is 4418683. The reversal of 4418681 is 1868144.

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 774400 + 3644281 = 880^2 + 1909^2 .

It is a cyclic number.

It is not a de Polignac number, because 4418681 - 2² = 4418677 is a prime.

It is a super-2 number, since 2×4418681² = 39049483559522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4418683) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3410 + ... + 4523.

It is an arithmetic number, because the mean of its divisors is an integer number (1106793).

Almost surely, 2^4418681 is an apocalyptic number.

It is an amenable number.

4418681 is a deficient number, since it is larger than the sum of its proper divisors (8491).

4418681 is an equidigital number, since it uses as much as digits as its factorization.

4418681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8490.

The product of its digits is 6144, while the sum is 32.

The square root of 4418681 is about 2102.0658885963. The cubic root of 4418681 is about 164.0958318550.

The spelling of 4418681 in words is "four million, four hundred eighteen thousand, six hundred eighty-one".