540149 has 2 divisors, whose sum is σ = 540150. Its totient is φ = 540148.

The previous prime is 540139. The next prime is 540157. The reversal of 540149 is 941045.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 422500 + 117649 = 650^2 + 343^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-540149 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (540119) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 270074 + 270075.

It is an arithmetic number, because the mean of its divisors is an integer number (270075).

2⁵⁴⁰¹⁴⁹ is an apocalyptic number.

It is an amenable number.

540149 is a deficient number, since it is larger than the sum of its proper divisors (1).

540149 is an equidigital number, since it uses as much as digits as its factorization.

540149 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 540149 is about 734.9482975013. The cubic root of 540149 is about 81.4400175910.

The spelling of 540149 in words is "five hundred forty thousand, one hundred forty-nine".