102539 has 2 divisors, whose sum is σ = 102540. Its totient is φ = 102538.

The previous prime is 102533. The next prime is 102547. The reversal of 102539 is 935201.

It is a weak prime.

It is an emirp because it is prime and its reverse (935201) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 102539 - 2⁴ = 102523 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 102539.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 102539.

It is not a weakly prime, because it can be changed into another prime (102533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51269 + 51270.

It is an arithmetic number, because the mean of its divisors is an integer number (51270).

2¹⁰²⁵³⁹ is an apocalyptic number.

102539 is a deficient number, since it is larger than the sum of its proper divisors (1).

102539 is an equidigital number, since it uses as much as digits as its factorization.

102539 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 270, while the sum is 20.

The square root of 102539 is about 320.2171138462. The cubic root of 102539 is about 46.8054429104.

The spelling of 102539 in words is "one hundred two thousand, five hundred thirty-nine".