181104 has 80 divisors (see below), whose sum is σ = 595200. Its totient is φ = 47040.

The previous prime is 181087. The next prime is 181123. The reversal of 181104 is 401181.

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16459 + ... + 16469.

It is an arithmetic number, because the mean of its divisors is an integer number (7440).

2¹⁸¹¹⁰⁴ is an apocalyptic number.

181104 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 181104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (297600).

181104 is an abundant number, since it is smaller than the sum of its proper divisors (414096).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

181104 is a wasteful number, since it uses less digits than its factorization.

181104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43 (or 23 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

The square root of 181104 is about 425.5631563000. The cubic root of 181104 is about 56.5773602887.

Adding to 181104 its reverse (401181), we get a palindrome (582285).

The spelling of 181104 in words is "one hundred eighty-one thousand, one hundred four".