181201 has 2 divisors, whose sum is σ = 181202. Its totient is φ = 181200.

The previous prime is 181199. The next prime is 181211. The reversal of 181201 is 102181.

181201 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 180625 + 576 = 425^2 + 24^2 .

It is an emirp because it is prime and its reverse (102181) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 181201 - 2¹ = 181199 is a prime.

Together with 181199, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (181211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 90600 + 90601.

It is an arithmetic number, because the mean of its divisors is an integer number (90601).

2¹⁸¹²⁰¹ is an apocalyptic number.

It is an amenable number.

181201 is a deficient number, since it is larger than the sum of its proper divisors (1).

181201 is an equidigital number, since it uses as much as digits as its factorization.

181201 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16, while the sum is 13.

The square root of 181201 is about 425.6771076767. The cubic root of 181201 is about 56.5874595032.

Adding to 181201 its reverse (102181), we get a palindrome (283382).

The spelling of 181201 in words is "one hundred eighty-one thousand, two hundred one".