2004181 has 8 divisors (see below), whose sum is σ = 2191104. Its totient is φ = 1824960.

The previous prime is 2004137. The next prime is 2004209. The reversal of 2004181 is 1814002.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2004181 - 2⁹ = 2003669 is a prime.

It is a super-2 number, since 2×2004181² = 8033482961522, which contains 22 as substring.

It is a Duffinian number.

2004181 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2004131) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1375 + ... + 2428.

It is an arithmetic number, because the mean of its divisors is an integer number (273888).

2^2004181 is an apocalyptic number.

It is an amenable number.

2004181 is a deficient number, since it is larger than the sum of its proper divisors (186923).

2004181 is a wasteful number, since it uses less digits than its factorization.

2004181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3851.

The product of its (nonzero) digits is 64, while the sum is 16.

The square root of 2004181 is about 1415.6909973578. The cubic root of 2004181 is about 126.0798393801.

Adding to 2004181 its reverse (1814002), we get a palindrome (3818183).

The spelling of 2004181 in words is "two million, four thousand, one hundred eighty-one".