135042423 has 4 divisors (see below), whose sum is σ = 180056568. Its totient is φ = 90028280.

The previous prime is 135042331. The next prime is 135042461. The reversal of 135042423 is 324240531.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 324240531 = 3 ⋅108080177.

It is a cyclic number.

It is not a de Polignac number, because 135042423 - 2¹⁶ = 134976887 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 135042393 and 135042402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135042623) 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 3 ways as a sum of consecutive naturals, for example, 22507068 + ... + 22507073.

It is an arithmetic number, because the mean of its divisors is an integer number (45014142).

Almost surely, 2^135042423 is an apocalyptic number.

135042423 is a deficient number, since it is larger than the sum of its proper divisors (45014145).

135042423 is an equidigital number, since it uses as much as digits as its factorization.

135042423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45014144.

The product of its (nonzero) digits is 2880, while the sum is 24.

The square root of 135042423 is about 11620.7754904739. The cubic root of 135042423 is about 513.0465134195.

Adding to 135042423 its reverse (324240531), we get a palindrome (459282954).

The spelling of 135042423 in words is "one hundred thirty-five million, forty-two thousand, four hundred twenty-three".