181252 has 12 divisors (see below), whose sum is σ = 320796. Its totient is φ = 89600.

The previous prime is 181243. The next prime is 181253. The reversal of 181252 is 252181.

It can be written as a sum of positive squares in 2 ways, for example, as 93636 + 87616 = 306^2 + 296^2 .

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (181253) by changing a digit.

181252 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 252 + ... + 652.

It is an arithmetic number, because the mean of its divisors is an integer number (26733).

2¹⁸¹²⁵² is an apocalyptic number.

It is an amenable number.

181252 is a deficient number, since it is larger than the sum of its proper divisors (139544).

181252 is a wasteful number, since it uses less digits than its factorization.

181252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 518 (or 516 counting only the distinct ones).

The product of its digits is 160, while the sum is 19.

The square root of 181252 is about 425.7370080226. The cubic root of 181252 is about 56.5927679539.

The spelling of 181252 in words is "one hundred eighty-one thousand, two hundred fifty-two".