8404181 has 6 divisors (see below), whose sum is σ = 8507682. Its totient is φ = 8301920.

The previous prime is 8404141. The next prime is 8404183. The reversal of 8404181 is 1814048.

It can be written as a sum of positive squares in 3 ways, for example, as 167281 + 8236900 = 409^2 + 2870^2 .

It is not a de Polignac number, because 8404181 - 2¹⁸ = 8142037 is a prime.

It is a super-2 number, since 2×8404181² = 141260516561522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 8404181.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8404183) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7391 + ... + 8451.

It is an arithmetic number, because the mean of its divisors is an integer number (1417947).

Almost surely, 2^8404181 is an apocalyptic number.

It is an amenable number.

8404181 is a deficient number, since it is larger than the sum of its proper divisors (103501).

8404181 is an equidigital number, since it uses as much as digits as its factorization.

8404181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1239 (or 1150 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 26.

The square root of 8404181 is about 2898.9965505326. The cubic root of 8404181 is about 203.3129923813.

The spelling of 8404181 in words is "eight million, four hundred four thousand, one hundred eighty-one".