135187129 has 27 divisors (see below), whose sum is σ = 174006693. Its totient is φ = 104643000.

The previous prime is 135187081. The next prime is 135187139. The reversal of 135187129 is 921781531.

The square root of 135187129 is 11627.

It is a perfect power (a square), and thus also a powerful number.

It is a de Polignac number, because none of the positive numbers 2^k-135187129 is a prime.

It is not an unprimeable number, because it can be changed into a prime (135187139) by changing a digit.

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 26 ways as a sum of consecutive naturals, for example, 895204 + ... + 895354.

Almost surely, 2^135187129 is an apocalyptic number.

135187129 is the 11627-th square number.

135187129 is the 5814-th centered octagonal number.

It is an amenable number.

135187129 is a deficient number, since it is larger than the sum of its proper divisors (38819564).

135187129 is an equidigital number, since it uses as much as digits as its factorization.

135187129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 338 (or 169 counting only the distinct ones).

The product of its digits is 15120, while the sum is 37.

The cubic root of 135187129 is about 513.2297013023.

The spelling of 135187129 in words is "one hundred thirty-five million, one hundred eighty-seven thousand, one hundred twenty-nine".