133441 has 8 divisors (see below), whose sum is σ = 166464. Its totient is φ = 103920.

The previous prime is 133439. The next prime is 133447. The reversal of 133441 is 144331.

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

It is a cyclic number.

It is not a de Polignac number, because 133441 - 2¹ = 133439 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133447) 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 7 ways as a sum of consecutive naturals, for example, 790 + ... + 943.

It is an arithmetic number, because the mean of its divisors is an integer number (20808).

2¹³³⁴⁴¹ is an apocalyptic number.

133441 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

133441 is a deficient number, since it is larger than the sum of its proper divisors (33023).

133441 is a wasteful number, since it uses less digits than its factorization.

133441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1751.

The product of its digits is 144, while the sum is 16.

The square root of 133441 is about 365.2957705750. The cubic root of 133441 is about 51.1010427903.

Adding to 133441 its reverse (144331), we get a palindrome (277772).

It can be divided in two parts, 133 and 441, that multiplied together give a triangular number (58653 = T₃₄₂).

The spelling of 133441 in words is "one hundred thirty-three thousand, four hundred forty-one".