133243 has 4 divisors (see below), whose sum is σ = 145368. Its totient is φ = 121120.

The previous prime is 133241. The next prime is 133253. The reversal of 133243 is 342331.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 342331 = 11 ⋅31121.

It is a cyclic number.

It is not a de Polignac number, because 133243 - 2¹ = 133241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133241) 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, 6046 + ... + 6067.

It is an arithmetic number, because the mean of its divisors is an integer number (36342).

2¹³³²⁴³ is an apocalyptic number.

133243 is a deficient number, since it is larger than the sum of its proper divisors (12125).

133243 is a wasteful number, since it uses less digits than its factorization.

133243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12124.

The product of its digits is 216, while the sum is 16.

The square root of 133243 is about 365.0246567014. The cubic root of 133243 is about 51.0757556722.

Adding to 133243 its reverse (342331), we get a palindrome (475574).

The spelling of 133243 in words is "one hundred thirty-three thousand, two hundred forty-three".