135549 has 6 divisors (see below), whose sum is σ = 195806. Its totient is φ = 90360.

The previous prime is 135533. The next prime is 135559. The reversal of 135549 is 945531.

135549 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 127449 + 8100 = 357^2 + 90^2 .

It is not a de Polignac number, because 135549 - 2⁴ = 135533 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 135549.

It is not an unprimeable number, because it can be changed into a prime (135559) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7522 + ... + 7539.

2¹³⁵⁵⁴⁹ is an apocalyptic number.

It is an amenable number.

135549 is a deficient number, since it is larger than the sum of its proper divisors (60257).

135549 is a wasteful number, since it uses less digits than its factorization.

135549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15067 (or 15064 counting only the distinct ones).

The product of its digits is 2700, while the sum is 27.

The square root of 135549 is about 368.1697977836. The cubic root of 135549 is about 51.3687233705.

The spelling of 135549 in words is "one hundred thirty-five thousand, five hundred forty-nine".