4418581 has 2 divisors, whose sum is σ = 4418582. Its totient is φ = 4418580.

The previous prime is 4418567. The next prime is 4418587. The reversal of 4418581 is 1858144.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2430481 + 1988100 = 1559^2 + 1410^2 .

It is a cyclic number.

It is not a de Polignac number, because 4418581 - 2⁹ = 4418069 is a prime.

It is a super-2 number, since 2×4418581² = 39047716107122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4418587) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2209290 + 2209291.

It is an arithmetic number, because the mean of its divisors is an integer number (2209291).

Almost surely, 2^4418581 is an apocalyptic number.

It is an amenable number.

4418581 is a deficient number, since it is larger than the sum of its proper divisors (1).

4418581 is an equidigital number, since it uses as much as digits as its factorization.

4418581 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5120, while the sum is 31.

The square root of 4418581 is about 2102.0421023376. The cubic root of 4418581 is about 164.0945939511.

The spelling of 4418581 in words is "four million, four hundred eighteen thousand, five hundred eighty-one".