135128498 has 4 divisors (see below), whose sum is σ = 202692750. Its totient is φ = 67564248.

The previous prime is 135128491. The next prime is 135128503. The reversal of 135128498 is 894821531.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 894821531 = 4441 ⋅201491.

It can be written as a sum of positive squares in only one way, i.e., 106151809 + 28976689 = 10303^2 + 5383^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (135128491) 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 as a sum of consecutive naturals, namely, 33782123 + ... + 33782126.

Almost surely, 2^135128498 is an apocalyptic number.

135128498 is a deficient number, since it is larger than the sum of its proper divisors (67564252).

135128498 is an equidigital number, since it uses as much as digits as its factorization.

135128498 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67564251.

The product of its digits is 69120, while the sum is 41.

The square root of 135128498 is about 11624.4783969002. The cubic root of 135128498 is about 513.1554942332.

The spelling of 135128498 in words is "one hundred thirty-five million, one hundred twenty-eight thousand, four hundred ninety-eight".