135655121 has 8 divisors (see below), whose sum is σ = 164154240. Its totient is φ = 109435968.

The previous prime is 135655109. The next prime is 135655123. The reversal of 135655121 is 121556531.

135655121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 135655121 - 2⁶ = 135655057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135655123) 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, 569861 + ... + 570098.

It is an arithmetic number, because the mean of its divisors is an integer number (20519280).

Almost surely, 2^135655121 is an apocalyptic number.

It is an amenable number.

135655121 is a deficient number, since it is larger than the sum of its proper divisors (28499119).

135655121 is a wasteful number, since it uses less digits than its factorization.

135655121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1139983.

The product of its digits is 4500, while the sum is 29.

The square root of 135655121 is about 11647.1078384292. The cubic root of 135655121 is about 513.8212535875.

The spelling of 135655121 in words is "one hundred thirty-five million, six hundred fifty-five thousand, one hundred twenty-one".