135023 has 4 divisors (see below), whose sum is σ = 154320. Its totient is φ = 115728.

The previous prime is 135019. The next prime is 135029. The reversal of 135023 is 320531.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 320531 = 37 ⋅8663.

It is a cyclic number.

It is not a de Polignac number, because 135023 - 2² = 135019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 134989 and 135007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135029) 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, 9638 + ... + 9651.

It is an arithmetic number, because the mean of its divisors is an integer number (38580).

2¹³⁵⁰²³ is an apocalyptic number.

135023 is a deficient number, since it is larger than the sum of its proper divisors (19297).

135023 is an equidigital number, since it uses as much as digits as its factorization.

135023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19296.

The product of its (nonzero) digits is 90, while the sum is 14.

The square root of 135023 is about 367.4547591201. The cubic root of 135023 is about 51.3021915272.

Adding to 135023 its reverse (320531), we get a palindrome (455554).

The spelling of 135023 in words is "one hundred thirty-five thousand, twenty-three".