181449 has 6 divisors (see below), whose sum is σ = 262106. Its totient is φ = 120960.

The previous prime is 181439. The next prime is 181457. The reversal of 181449 is 944181.

It can be written as a sum of positive squares in only one way, i.e., 164025 + 17424 = 405^2 + 132^2 .

It is not a de Polignac number, because 181449 - 2⁸ = 181193 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 181449.

It is not an unprimeable number, because it can be changed into a prime (181409) 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, 10072 + ... + 10089.

2¹⁸¹⁴⁴⁹ is an apocalyptic number.

It is an amenable number.

181449 is a deficient number, since it is larger than the sum of its proper divisors (80657).

181449 is a wasteful number, since it uses less digits than its factorization.

181449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20167 (or 20164 counting only the distinct ones).

The product of its digits is 1152, while the sum is 27.

The square root of 181449 is about 425.9683086804. The cubic root of 181449 is about 56.6132637987.

Adding to 181449 its sum of digits (27), we get a square (181476 = 426²).

It can be divided in two parts, 181 and 449, that added together give a triangular number (630 = T₃₅).

The spelling of 181449 in words is "one hundred eighty-one thousand, four hundred forty-nine".