133123 has 4 divisors (see below), whose sum is σ = 133920. Its totient is φ = 132328.

The previous prime is 133121. The next prime is 133153. The reversal of 133123 is 321331.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 133123 - 2¹ = 133121 is a prime.

It is a Duffinian number.

133123 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (133121) 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, 40 + ... + 517.

It is an arithmetic number, because the mean of its divisors is an integer number (33480).

2¹³³¹²³ is an apocalyptic number.

133123 is a deficient number, since it is larger than the sum of its proper divisors (797).

133123 is an equidigital number, since it uses as much as digits as its factorization.

133123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 796.

The product of its digits is 54, while the sum is 13.

The square root of 133123 is about 364.8602472180. The cubic root of 133123 is about 51.0604179520.

Adding to 133123 its reverse (321331), we get a palindrome (454454).

It can be divided in two parts, 133 and 123, that added together give a 8-th power (256 = 2⁸).

The spelling of 133123 in words is "one hundred thirty-three thousand, one hundred twenty-three".