135539121 has 8 divisors (see below), whose sum is σ = 180861120. Its totient is φ = 90288272.

The previous prime is 135539101. The next prime is 135539137. The reversal of 135539121 is 121935531.

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-135539121 is a prime.

It is not an unprimeable number, because it can be changed into a prime (135539101) 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, 13170 + ... + 21083.

It is an arithmetic number, because the mean of its divisors is an integer number (22607640).

Almost surely, 2^135539121 is an apocalyptic number.

It is an amenable number.

135539121 is a deficient number, since it is larger than the sum of its proper divisors (45321999).

135539121 is a wasteful number, since it uses less digits than its factorization.

135539121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35575.

The product of its digits is 4050, while the sum is 30.

The square root of 135539121 is about 11642.1269963869. The cubic root of 135539121 is about 513.6747539882.

The spelling of 135539121 in words is "one hundred thirty-five million, five hundred thirty-nine thousand, one hundred twenty-one".