136539 has 16 divisors (see below), whose sum is σ = 218400. Its totient is φ = 83808.

The previous prime is 136537. The next prime is 136541. The reversal of 136539 is 935631.

136539 is a `hidden beast` number, since 1 + 3 + 653 + 9 = 666.

136539 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (136537) and next prime (136541).

It is not a de Polignac number, because 136539 - 2¹ = 136537 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

Its product of digits (2430) is a multiple of the sum of its prime divisors (405).

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 136539.

It is not an unprimeable number, because it can be changed into a prime (136531) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 157 + ... + 545.

It is an arithmetic number, because the mean of its divisors is an integer number (13650).

2¹³⁶⁵³⁹ is an apocalyptic number.

136539 is the 234-th heptagonal number.

136539 is a deficient number, since it is larger than the sum of its proper divisors (81861).

136539 is a wasteful number, since it uses less digits than its factorization.

136539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 411 (or 405 counting only the distinct ones).

The product of its digits is 2430, while the sum is 27.

The square root of 136539 is about 369.5118401351. The cubic root of 136539 is about 51.4934795528.

It can be divided in two parts, 1365 and 39, that multiplied together give a palindrome (53235).

The spelling of 136539 in words is "one hundred thirty-six thousand, five hundred thirty-nine".