540139 has 2 divisors, whose sum is σ = 540140. Its totient is φ = 540138.

The previous prime is 540121. The next prime is 540149. The reversal of 540139 is 931045.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 540139 - 2¹⁵ = 507371 is a prime.

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, 270069 + 270070.

It is an arithmetic number, because the mean of its divisors is an integer number (270070).

2⁵⁴⁰¹³⁹ is an apocalyptic number.

540139 is a deficient number, since it is larger than the sum of its proper divisors (1).

540139 is an equidigital number, since it uses as much as digits as its factorization.

540139 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 540, while the sum is 22.

The square root of 540139 is about 734.9414942701. The cubic root of 540139 is about 81.4395150104.

The spelling of 540139 in words is "five hundred forty thousand, one hundred thirty-nine".