181372 has 6 divisors (see below), whose sum is σ = 317408. Its totient is φ = 90684.

The previous prime is 181361. The next prime is 181387. The reversal of 181372 is 273181.

181372 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

181372 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22668 + ... + 22675.

2¹⁸¹³⁷² is an apocalyptic number.

It is an amenable number.

181372 is a deficient number, since it is larger than the sum of its proper divisors (136036).

181372 is a wasteful number, since it uses less digits than its factorization.

181372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45347 (or 45345 counting only the distinct ones).

The product of its digits is 336, while the sum is 22.

The square root of 181372 is about 425.8779167790. The cubic root of 181372 is about 56.6052544993.

Subtracting 181372 from its reverse (273181), we obtain a square (91809 = 303²).

The spelling of 181372 in words is "one hundred eighty-one thousand, three hundred seventy-two".