181442041 has 6 divisors (see below), whose sum is σ = 199436426. Its totient is φ = 164947200.

The previous prime is 181442033. The next prime is 181442057. The reversal of 181442041 is 140244181.

It can be written as a sum of positive squares in only one way, i.e., 143496441 + 37945600 = 11979^2 + 6160^2 .

It is not a de Polignac number, because 181442041 - 2³ = 181442033 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 181441997 and 181442015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (181442141) 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, 749640 + ... + 749881.

Almost surely, 2^181442041 is an apocalyptic number.

181442041 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

181442041 is a deficient number, since it is larger than the sum of its proper divisors (17994385).

181442041 is a wasteful number, since it uses less digits than its factorization.

181442041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1499543 (or 1499532 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 25.

The square root of 181442041 is about 13470.0423533113. The cubic root of 181442041 is about 566.1254003843.

The spelling of 181442041 in words is "one hundred eighty-one million, four hundred forty-two thousand, forty-one".