181841 has 8 divisors (see below), whose sum is σ = 202368. Its totient is φ = 162000.

The previous prime is 181837. The next prime is 181871. The reversal of 181841 is 148181.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 181841 - 2² = 181837 is a prime.

It is a super-2 number, since 2×181841² = 66132298562, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (181871) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 536 + ... + 806.

It is an arithmetic number, because the mean of its divisors is an integer number (25296).

2¹⁸¹⁸⁴¹ is an apocalyptic number.

181841 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

181841 is a deficient number, since it is larger than the sum of its proper divisors (20527).

181841 is a wasteful number, since it uses less digits than its factorization.

181841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 343.

The product of its digits is 256, while the sum is 23.

The square root of 181841 is about 426.4281885617. The cubic root of 181841 is about 56.6540033218.

The spelling of 181841 in words is "one hundred eighty-one thousand, eight hundred forty-one".