133145 has 8 divisors (see below), whose sum is σ = 165120. Its totient is φ = 102960.

The previous prime is 133121. The next prime is 133153. The reversal of 133145 is 541331.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 133145 - 2¹² = 129049 is a prime.

It is a Curzon number.

It is a plaindrome in base 9.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 133145.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 275 + ... + 584.

It is an arithmetic number, because the mean of its divisors is an integer number (20640).

2¹³³¹⁴⁵ is an apocalyptic number.

It is an amenable number.

133145 is a deficient number, since it is larger than the sum of its proper divisors (31975).

133145 is an equidigital number, since it uses as much as digits as its factorization.

133145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 895.

The product of its digits is 180, while the sum is 17.

The square root of 133145 is about 364.8903945022. The cubic root of 133145 is about 51.0632305571.

Adding to 133145 its reverse (541331), we get a palindrome (674476).

It can be divided in two parts, 1331 and 45, that multiplied together give a palindrome (59895).

The spelling of 133145 in words is "one hundred thirty-three thousand, one hundred forty-five".