181072 has 10 divisors (see below), whose sum is σ = 350858. Its totient is φ = 90528.

The previous prime is 181063. The next prime is 181081. The reversal of 181072 is 270181.

It is an interprime number because it is at equal distance from previous prime (181063) and next prime (181081).

It can be written as a sum of positive squares in only one way, i.e., 179776 + 1296 = 424^2 + 36^2 .

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5643 + ... + 5674.

2¹⁸¹⁰⁷² is an apocalyptic number.

It is an amenable number.

181072 is a deficient number, since it is larger than the sum of its proper divisors (169786).

181072 is a wasteful number, since it uses less digits than its factorization.

181072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11325 (or 11319 counting only the distinct ones).

The product of its (nonzero) digits is 112, while the sum is 19.

The square root of 181072 is about 425.5255573993. The cubic root of 181072 is about 56.5740277980.

The spelling of 181072 in words is "one hundred eighty-one thousand, seventy-two".