133404 has 12 divisors (see below), whose sum is σ = 311304. Its totient is φ = 44464.

The previous prime is 133403. The next prime is 133417. The reversal of 133404 is 404331.

It is a tau number, because it is divible by the number of its divisors (12).

It is a plaindrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133403) 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, 5547 + ... + 5570.

It is an arithmetic number, because the mean of its divisors is an integer number (25942).

2¹³³⁴⁰⁴ is an apocalyptic number.

It is an amenable number.

133404 is an abundant number, since it is smaller than the sum of its proper divisors (177900).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

133404 is a wasteful number, since it uses less digits than its factorization.

133404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11124 (or 11122 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 133404 is about 365.2451231707. The cubic root of 133404 is about 51.0963193211.

Adding to 133404 its reverse (404331), we get a palindrome (537735).

The spelling of 133404 in words is "one hundred thirty-three thousand, four hundred four".