4068181 has 4 divisors (see below), whose sum is σ = 4381132. Its totient is φ = 3755232.

The previous prime is 4068139. The next prime is 4068203. The reversal of 4068181 is 1818604.

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 1540081 + 2528100 = 1241^2 + 1590^2 .

It is not a de Polignac number, because 4068181 - 2¹⁹ = 3543893 is a prime.

It is a super-2 number, since 2×4068181² = 33100193297522, 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 (4068131) 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, 156456 + ... + 156481.

It is an arithmetic number, because the mean of its divisors is an integer number (1095283).

Almost surely, 2^4068181 is an apocalyptic number.

4068181 is the 1165-th hex number.

It is an amenable number.

4068181 is a deficient number, since it is larger than the sum of its proper divisors (312951).

4068181 is a wasteful number, since it uses less digits than its factorization.

4068181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 312950.

The product of its (nonzero) digits is 1536, while the sum is 28.

The square root of 4068181 is about 2016.9732273880. The cubic root of 4068181 is about 159.6369502787.

The spelling of 4068181 in words is "four million, sixty-eight thousand, one hundred eighty-one".