135135321 has 8 divisors (see below), whose sum is σ = 180275040. Its totient is φ = 90042912.

The previous prime is 135135271. The next prime is 135135361. The reversal of 135135321 is 123531531.

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

It is not a de Polignac number, because 135135321 - 2¹⁹ = 134611033 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 135135291 and 135135300.

It is not an unprimeable number, because it can be changed into a prime (135135361) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4515 + ... + 17048.

It is an arithmetic number, because the mean of its divisors is an integer number (22534380).

Almost surely, 2^135135321 is an apocalyptic number.

It is an amenable number.

135135321 is a deficient number, since it is larger than the sum of its proper divisors (45139719).

135135321 is a wasteful number, since it uses less digits than its factorization.

135135321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23655.

The product of its digits is 1350, while the sum is 24.

The square root of 135135321 is about 11624.7718687293. The cubic root of 135135321 is about 513.1641309532.

Adding to 135135321 its reverse (123531531), we get a palindrome (258666852).

The spelling of 135135321 in words is "one hundred thirty-five million, one hundred thirty-five thousand, three hundred twenty-one".