540181 has 2 divisors, whose sum is σ = 540182. Its totient is φ = 540180.

The previous prime is 540179. The next prime is 540187. The reversal of 540181 is 181045.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 285156 + 255025 = 534^2 + 505^2 .

It is a cyclic number.

It is not a de Polignac number, because 540181 - 2¹ = 540179 is a prime.

It is a super-2 number, since 2×540181² = 583591025522, which contains 22 as substring.

Together with 540179, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (540187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 270090 + 270091.

It is an arithmetic number, because the mean of its divisors is an integer number (270091).

2⁵⁴⁰¹⁸¹ is an apocalyptic number.

It is an amenable number.

540181 is a deficient number, since it is larger than the sum of its proper divisors (1).

540181 is an equidigital number, since it uses as much as digits as its factorization.

540181 is an odious number, because the sum of its binary digits is odd.

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

The square root of 540181 is about 734.9700674177. The cubic root of 540181 is about 81.4416258072.

It can be divided in two parts, 5 and 40181, that added together give a triangular number (40186 = T₂₈₃).

The spelling of 540181 in words is "five hundred forty thousand, one hundred eighty-one".