135617128 has 8 divisors (see below), whose sum is σ = 254282130. Its totient is φ = 67808560.

The previous prime is 135617123. The next prime is 135617147. The reversal of 135617128 is 821716531.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 120077764 + 15539364 = 10958^2 + 3942^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 135617093 and 135617102.

It is not an unprimeable number, because it can be changed into a prime (135617123) 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 as a sum of consecutive naturals, namely, 8476063 + ... + 8476078.

Almost surely, 2^135617128 is an apocalyptic number.

It is an amenable number.

135617128 is a deficient number, since it is larger than the sum of its proper divisors (118665002).

135617128 is a wasteful number, since it uses less digits than its factorization.

135617128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16952147 (or 16952143 counting only the distinct ones).

The product of its digits is 10080, while the sum is 34.

The square root of 135617128 is about 11645.4767184517. The cubic root of 135617128 is about 513.7732803803.

The spelling of 135617128 in words is "one hundred thirty-five million, six hundred seventeen thousand, one hundred twenty-eight".