135336321 has 12 divisors (see below), whose sum is σ = 196216020. Its totient is φ = 89887200.

The previous prime is 135336319. The next prime is 135336349. The reversal of 135336321 is 123633531.

It is a happy number.

135336321 is a `hidden beast` number, since 1 + 3 + 5 + 336 + 321 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 70308225 + 65028096 = 8385^2 + 8064^2 .

It is not a de Polignac number, because 135336321 - 2¹ = 135336319 is a prime.

It is not an unprimeable number, because it can be changed into a prime (135336391) 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 in 11 ways as a sum of consecutive naturals, for example, 25530 + ... + 30371.

It is an arithmetic number, because the mean of its divisors is an integer number (16351335).

Almost surely, 2^135336321 is an apocalyptic number.

It is an amenable number.

135336321 is a deficient number, since it is larger than the sum of its proper divisors (60879699).

135336321 is a wasteful number, since it uses less digits than its factorization.

135336321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56176 (or 56173 counting only the distinct ones).

The product of its digits is 4860, while the sum is 27.

The square root of 135336321 is about 11633.4139873040. The cubic root of 135336321 is about 513.4184313391.

Adding to 135336321 its reverse (123633531), we get a palindrome (258969852).

The spelling of 135336321 in words is "one hundred thirty-five million, three hundred thirty-six thousand, three hundred twenty-one".