133546 has 8 divisors (see below), whose sum is σ = 228960. Its totient is φ = 57228.

The previous prime is 133543. The next prime is 133559. The reversal of 133546 is 645331.

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

It is a d-powerful number, because it can be written as 1 + 3⁷ + 5⁷ + 3⁸ + 4² + 6⁶ .

It is not an unprimeable number, because it can be changed into a prime (133541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4756 + ... + 4783.

It is an arithmetic number, because the mean of its divisors is an integer number (28620).

2¹³³⁵⁴⁶ is an apocalyptic number.

133546 is a deficient number, since it is larger than the sum of its proper divisors (95414).

133546 is an equidigital number, since it uses as much as digits as its factorization.

133546 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9548.

The product of its digits is 1080, while the sum is 22.

The square root of 133546 is about 365.4394614707. The cubic root of 133546 is about 51.1144424770.

Adding to 133546 its reverse (645331), we get a palindrome (778877).

The spelling of 133546 in words is "one hundred thirty-three thousand, five hundred forty-six".