133285 has 16 divisors (see below), whose sum is σ = 178560. Its totient is φ = 95040.

The previous prime is 133283. The next prime is 133303. The reversal of 133285 is 582331.

It is not a de Polignac number, because 133285 - 2¹ = 133283 is a prime.

It is a plaindrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133283) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2155 + ... + 2215.

It is an arithmetic number, because the mean of its divisors is an integer number (11160).

2¹³³²⁸⁵ is an apocalyptic number.

It is an amenable number.

133285 is a deficient number, since it is larger than the sum of its proper divisors (45275).

133285 is a wasteful number, since it uses less digits than its factorization.

133285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108.

The product of its digits is 720, while the sum is 22.

The square root of 133285 is about 365.0821825288. The cubic root of 133285 is about 51.0811216986.

The spelling of 133285 in words is "one hundred thirty-three thousand, two hundred eighty-five".