4081161 has 12 divisors (see below), whose sum is σ = 6330192. Its totient is φ = 2332008.

The previous prime is 4081157. The next prime is 4081163. The reversal of 4081161 is 1611804.

It is not a de Polignac number, because 4081161 - 2² = 4081157 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

4081161 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (4081163) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13735 + ... + 14028.

It is an arithmetic number, because the mean of its divisors is an integer number (527516).

Almost surely, 2^4081161 is an apocalyptic number.

It is an amenable number.

4081161 is a deficient number, since it is larger than the sum of its proper divisors (2249031).

4081161 is a wasteful number, since it uses less digits than its factorization.

4081161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27780 (or 27773 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 21.

The square root of 4081161 is about 2020.1883575548. The cubic root of 4081161 is about 159.8065500554.

Adding to 4081161 its reverse (1611804), we get a palindrome (5692965).

The spelling of 4081161 in words is "four million, eighty-one thousand, one hundred sixty-one".