133249 has 4 divisors (see below), whose sum is σ = 134064. Its totient is φ = 132436.

The previous prime is 133241. The next prime is 133253. The reversal of 133249 is 942331.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 133249 - 2³ = 133241 is a prime.

It is a Duffinian number.

It is a plaindrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (133241) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67 + ... + 520.

It is an arithmetic number, because the mean of its divisors is an integer number (33516).

2¹³³²⁴⁹ is an apocalyptic number.

It is an amenable number.

133249 is a deficient number, since it is larger than the sum of its proper divisors (815).

133249 is an equidigital number, since it uses as much as digits as its factorization.

133249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 814.

The product of its digits is 648, while the sum is 22.

The square root of 133249 is about 365.0328752318. The cubic root of 133249 is about 51.0765223164.

The spelling of 133249 in words is "one hundred thirty-three thousand, two hundred forty-nine".