9404181 has 10 divisors (see below), whose sum is σ = 14048342. Its totient is φ = 6269400.

The previous prime is 9404177. The next prime is 9404201. The reversal of 9404181 is 1814049.

It can be written as a sum of positive squares in only one way, i.e., 5267025 + 4137156 = 2295^2 + 2034^2 .

It is not a de Polignac number, because 9404181 - 2² = 9404177 is a prime.

It is a super-2 number, since 2×9404181² = 176877240561522, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

9404181 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9404141) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 57970 + ... + 58131.

Almost surely, 2^9404181 is an apocalyptic number.

It is an amenable number.

9404181 is a deficient number, since it is larger than the sum of its proper divisors (4644161).

9404181 is a wasteful number, since it uses less digits than its factorization.

9404181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116113 (or 116104 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 9404181 is about 3066.6237134673. The cubic root of 9404181 is about 211.0767149153.

The spelling of 9404181 in words is "nine million, four hundred four thousand, one hundred eighty-one".