135203 has 4 divisors (see below), whose sum is σ = 137808. Its totient is φ = 132600.

The previous prime is 135197. The next prime is 135209. The reversal of 135203 is 302531.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 302531 = 71 ⋅4261.

It is an interprime number because it is at equal distance from previous prime (135197) and next prime (135209).

It is a cyclic number.

It is not a de Polignac number, because 135203 - 2⁸ = 134947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1223 + ... + 1328.

It is an arithmetic number, because the mean of its divisors is an integer number (34452).

2¹³⁵²⁰³ is an apocalyptic number.

135203 is a deficient number, since it is larger than the sum of its proper divisors (2605).

135203 is an equidigital number, since it uses as much as digits as its factorization.

135203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2604.

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

The square root of 135203 is about 367.6996056566. The cubic root of 135203 is about 51.3249784945.

Adding to 135203 its reverse (302531), we get a palindrome (437734).

The spelling of 135203 in words is "one hundred thirty-five thousand, two hundred three".