135281279 has 8 divisors (see below), whose sum is σ = 155393568. Its totient is φ = 115365600.

The previous prime is 135281269. The next prime is 135281299. The reversal of 135281279 is 972182531.

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

It is not a de Polignac number, because 135281279 - 2⁸ = 135281023 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 (135281269) 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 7 ways as a sum of consecutive naturals, for example, 47672 + ... + 50429.

It is an arithmetic number, because the mean of its divisors is an integer number (19424196).

Almost surely, 2^135281279 is an apocalyptic number.

135281279 is a deficient number, since it is larger than the sum of its proper divisors (20112289).

135281279 is an equidigital number, since it uses as much as digits as its factorization.

135281279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98305.

The product of its digits is 30240, while the sum is 38.

The square root of 135281279 is about 11631.0480611164. The cubic root of 135281279 is about 513.3488185674.

The spelling of 135281279 in words is "one hundred thirty-five million, two hundred eighty-one thousand, two hundred seventy-nine".