4065181 has 4 divisors (see below), whose sum is σ = 4241952. Its totient is φ = 3888412.

The previous prime is 4065179. The next prime is 4065197. The reversal of 4065181 is 1815604.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 4065181 - 2¹ = 4065179 is a prime.

It is a super-2 number, since 2×4065181² = 33051393125522, 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 (4065161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 88351 + ... + 88396.

It is an arithmetic number, because the mean of its divisors is an integer number (1060488).

Almost surely, 2^4065181 is an apocalyptic number.

It is an amenable number.

4065181 is a deficient number, since it is larger than the sum of its proper divisors (176771).

4065181 is a wasteful number, since it uses less digits than its factorization.

4065181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176770.

The product of its (nonzero) digits is 960, while the sum is 25.

The square root of 4065181 is about 2016.2294016307. The cubic root of 4065181 is about 159.5977002535.

The spelling of 4065181 in words is "four million, sixty-five thousand, one hundred eighty-one".