181804141 has 16 divisors (see below), whose sum is σ = 194616000. Its totient is φ = 169344000.

The previous prime is 181804097. The next prime is 181804159. The reversal of 181804141 is 141408181.

It is a 5-Lehmer number, since φ(181804141) divides (181804141-1)⁵.

It is a cyclic number.

It is not a de Polignac number, because 181804141 - 2¹⁷ = 181673069 is a prime.

It is a Duffinian number.

181804141 is a modest number, since divided by 4141 gives 1818 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (181804841) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 404685 + ... + 405133.

It is an arithmetic number, because the mean of its divisors is an integer number (12163500).

Almost surely, 2^181804141 is an apocalyptic number.

It is an amenable number.

181804141 is a deficient number, since it is larger than the sum of its proper divisors (12811859).

181804141 is a wasteful number, since it uses less digits than its factorization.

181804141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 780.

The product of its (nonzero) digits is 1024, while the sum is 28.

The square root of 181804141 is about 13483.4765917400. The cubic root of 181804141 is about 566.5017515871.

The spelling of 181804141 in words is "one hundred eighty-one million, eight hundred four thousand, one hundred forty-one".