135281499 has 4 divisors (see below), whose sum is σ = 180375336. Its totient is φ = 90187664.

The previous prime is 135281467. The next prime is 135281519. The reversal of 135281499 is 994182531.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 135281499 - 2⁵ = 135281467 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 135281499.

It is not an unprimeable number, because it can be changed into a prime (135281299) 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, 22546914 + ... + 22546919.

It is an arithmetic number, because the mean of its divisors is an integer number (45093834).

Almost surely, 2^135281499 is an apocalyptic number.

135281499 is a deficient number, since it is larger than the sum of its proper divisors (45093837).

135281499 is an equidigital number, since it uses as much as digits as its factorization.

135281499 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45093836.

The product of its digits is 77760, while the sum is 42.

The square root of 135281499 is about 11631.0575185578. The cubic root of 135281499 is about 513.3490968436.

The spelling of 135281499 in words is "one hundred thirty-five million, two hundred eighty-one thousand, four hundred ninety-nine".