133171 has 8 divisors (see below), whose sum is σ = 144320. Its totient is φ = 122472.

The previous prime is 133169. The next prime is 133183. The reversal of 133171 is 171331.

133171 = T₆₄ + T₆₅ + ... + T₁₀₁.

It is a happy number.

133171 is nontrivially palindromic in base 14.

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 133171 - 2¹ = 133169 is a prime.

It is an Ulam number.

It is a Duffinian number.

133171 is a modest number, since divided by 171 gives 133 as remainder.

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 7 ways as a sum of consecutive naturals, for example, 736 + ... + 898.

It is an arithmetic number, because the mean of its divisors is an integer number (18040).

2¹³³¹⁷¹ is an apocalyptic number.

133171 is a deficient number, since it is larger than the sum of its proper divisors (11149).

133171 is a wasteful number, since it uses less digits than its factorization.

133171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225.

The product of its digits is 63, while the sum is 16.

The square root of 133171 is about 364.9260198999. The cubic root of 133171 is about 51.0665541457.

The spelling of 133171 in words is "one hundred thirty-three thousand, one hundred seventy-one".