4168181 has 2 divisors, whose sum is σ = 4168182. Its totient is φ = 4168180.

The previous prime is 4168159. The next prime is 4168207. The reversal of 4168181 is 1818614.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4165681 + 2500 = 2041^2 + 50^2 .

It is a cyclic number.

It is not a de Polignac number, because 4168181 - 2⁶ = 4168117 is a prime.

It is a super-2 number, since 2×4168181² = 34747465697522, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4168121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2084090 + 2084091.

It is an arithmetic number, because the mean of its divisors is an integer number (2084091).

Almost surely, 2^4168181 is an apocalyptic number.

It is an amenable number.

4168181 is a deficient number, since it is larger than the sum of its proper divisors (1).

4168181 is an equidigital number, since it uses as much as digits as its factorization.

4168181 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1536, while the sum is 29.

The square root of 4168181 is about 2041.6123530191. The cubic root of 4168181 is about 160.9343893765.

The spelling of 4168181 in words is "four million, one hundred sixty-eight thousand, one hundred eighty-one".