4013181 has 12 divisors (see below), whose sum is σ = 5857852. Its totient is φ = 2647296.

The previous prime is 4013179. The next prime is 4013183. The reversal of 4013181 is 1813104.

It is an interprime number because it is at equal distance from previous prime (4013179) and next prime (4013183).

It can be written as a sum of positive squares in 2 ways, for example, as 933156 + 3080025 = 966^2 + 1755^2 .

It is not a de Polignac number, because 4013181 - 2¹ = 4013179 is a prime.

It is a super-2 number, since 2×4013181² = 32211243477522, 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 (4013183) 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, 1426 + ... + 3171.

Almost surely, 2^4013181 is an apocalyptic number.

It is an amenable number.

4013181 is a deficient number, since it is larger than the sum of its proper divisors (1844671).

4013181 is a wasteful number, since it uses less digits than its factorization.

4013181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4700 (or 4697 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

The square root of 4013181 is about 2003.2925397954. The cubic root of 4013181 is about 158.9142768009.

Adding to 4013181 its reverse (1813104), we get a palindrome (5826285).

The spelling of 4013181 in words is "four million, thirteen thousand, one hundred eighty-one".