4165181 has 2 divisors, whose sum is σ = 4165182. Its totient is φ = 4165180.

The previous prime is 4165177. The next prime is 4165193. The reversal of 4165181 is 1815614.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2805625 + 1359556 = 1675^2 + 1166^2 .

It is a cyclic number.

It is not a de Polignac number, because 4165181 - 2² = 4165177 is a prime.

It is a super-2 number, since 2×4165181² = 34697465525522, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 4165181.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4165781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2082590 + 2082591.

It is an arithmetic number, because the mean of its divisors is an integer number (2082591).

Almost surely, 2^4165181 is an apocalyptic number.

It is an amenable number.

4165181 is a deficient number, since it is larger than the sum of its proper divisors (1).

4165181 is an equidigital number, since it uses as much as digits as its factorization.

4165181 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 960, while the sum is 26.

The square root of 4165181 is about 2040.8775073482. The cubic root of 4165181 is about 160.8957698888.

The spelling of 4165181 in words is "four million, one hundred sixty-five thousand, one hundred eighty-one".