135161 has 8 divisors (see below), whose sum is σ = 150024. Its totient is φ = 120960.

The previous prime is 135151. The next prime is 135173. The reversal of 135161 is 161531.

It can be written as a sum of positive squares in 4 ways, for example, as 32761 + 102400 = 181^2 + 320^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-135161 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 135161.

It is not an unprimeable number, because it can be changed into a prime (135101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 341 + ... + 621.

It is an arithmetic number, because the mean of its divisors is an integer number (18753).

2¹³⁵¹⁶¹ is an apocalyptic number.

It is an amenable number.

135161 is a deficient number, since it is larger than the sum of its proper divisors (14863).

135161 is a wasteful number, since it uses less digits than its factorization.

135161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 331.

The product of its digits is 90, while the sum is 17.

The square root of 135161 is about 367.6424893834. The cubic root of 135161 is about 51.3196633453.

Adding to 135161 its reverse (161531), we get a palindrome (296692).

The spelling of 135161 in words is "one hundred thirty-five thousand, one hundred sixty-one".