135125279 has 4 divisors (see below), whose sum is σ = 135187560. Its totient is φ = 135063000.

The previous prime is 135125273. The next prime is 135125317. The reversal of 135125279 is 972521531.

135125279 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 972521531 = 24709 ⋅39359.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-135125279 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135125273) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27764 + ... + 32265.

It is an arithmetic number, because the mean of its divisors is an integer number (33796890).

Almost surely, 2^135125279 is an apocalyptic number.

135125279 is a deficient number, since it is larger than the sum of its proper divisors (62281).

135125279 is an equidigital number, since it uses as much as digits as its factorization.

135125279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62280.

The product of its digits is 18900, while the sum is 35.

The square root of 135125279 is about 11624.3399382503. The cubic root of 135125279 is about 513.1514194435.

The spelling of 135125279 in words is "one hundred thirty-five million, one hundred twenty-five thousand, two hundred seventy-nine".