135128786 has 16 divisors (see below), whose sum is σ = 221866008. Its totient is φ = 61344000.

The previous prime is 135128771. The next prime is 135128827. The reversal of 135128786 is 687821531.

135128786 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 61701025 + 73427761 = 7855^2 + 8569^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41015 + ... + 44186.

Almost surely, 2^135128786 is an apocalyptic number.

135128786 is a deficient number, since it is larger than the sum of its proper divisors (86737222).

135128786 is a wasteful number, since it uses less digits than its factorization.

135128786 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85277.

The product of its digits is 80640, while the sum is 41.

The square root of 135128786 is about 11624.4907845462. The cubic root of 135128786 is about 513.1558587965.

The spelling of 135128786 in words is "one hundred thirty-five million, one hundred twenty-eight thousand, seven hundred eighty-six".