128072135 has 8 divisors (see below), whose sum is σ = 162727056. Its totient is φ = 96430720.

The previous prime is 128072117. The next prime is 128072167. The reversal of 128072135 is 531270821.

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

It is a de Polignac number, because none of the positive numbers 2^k-128072135 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 128072098 and 128072107.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 753281 + ... + 753450.

It is an arithmetic number, because the mean of its divisors is an integer number (20340882).

Almost surely, 2^128072135 is an apocalyptic number.

128072135 is a deficient number, since it is larger than the sum of its proper divisors (34654921).

128072135 is a wasteful number, since it uses less digits than its factorization.

128072135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1506753.

The product of its (nonzero) digits is 3360, while the sum is 29.

The square root of 128072135 is about 11316.8959966945. The cubic root of 128072135 is about 504.0630734345.

The spelling of 128072135 in words is "one hundred twenty-eight million, seventy-two thousand, one hundred thirty-five".