135281423 has 4 divisors (see below), whose sum is σ = 141163248. Its totient is φ = 129399600.

The previous prime is 135281411. The next prime is 135281437. The reversal of 135281423 is 324182531.

It is a happy number.

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 135281423 - 2⁴ = 135281407 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 (135281023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2940878 + ... + 2940923.

It is an arithmetic number, because the mean of its divisors is an integer number (35290812).

Almost surely, 2^135281423 is an apocalyptic number.

135281423 is a deficient number, since it is larger than the sum of its proper divisors (5881825).

135281423 is an equidigital number, since it uses as much as digits as its factorization.

135281423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5881824.

The product of its digits is 5760, while the sum is 29.

The square root of 135281423 is about 11631.0542514426. The cubic root of 135281423 is about 513.3490007118.

The spelling of 135281423 in words is "one hundred thirty-five million, two hundred eighty-one thousand, four hundred twenty-three".