181149 has 4 divisors (see below), whose sum is σ = 241536. Its totient is φ = 120764.

The previous prime is 181141. The next prime is 181157. The reversal of 181149 is 941181.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 941181 = 3 ⋅313727.

It is an interprime number because it is at equal distance from previous prime (181141) and next prime (181157).

It is a cyclic number.

It is not a de Polignac number, because 181149 - 2³ = 181141 is a prime.

It is a D-number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (181141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30189 + ... + 30194.

It is an arithmetic number, because the mean of its divisors is an integer number (60384).

2¹⁸¹¹⁴⁹ is an apocalyptic number.

It is an amenable number.

181149 is a deficient number, since it is larger than the sum of its proper divisors (60387).

181149 is an equidigital number, since it uses as much as digits as its factorization.

181149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60386.

The product of its digits is 288, while the sum is 24.

The square root of 181149 is about 425.6160241344. The cubic root of 181149 is about 56.5820459396.

The spelling of 181149 in words is "one hundred eighty-one thousand, one hundred forty-nine".