133406 has 16 divisors (see below), whose sum is σ = 246624. Its totient is φ = 52704.

The previous prime is 133403. The next prime is 133417. The reversal of 133406 is 604331.

It is a plaindrome in base 9.

It is a zygodrome in base 9.

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 pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 185 + ... + 548.

It is an arithmetic number, because the mean of its divisors is an integer number (15414).

2¹³³⁴⁰⁶ is an apocalyptic number.

133406 is a deficient number, since it is larger than the sum of its proper divisors (113218).

133406 is a wasteful number, since it uses less digits than its factorization.

133406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 755.

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 133406 is about 365.2478610478. The cubic root of 133406 is about 51.0965746661.

Adding to 133406 its reverse (604331), we get a palindrome (737737).

The spelling of 133406 in words is "one hundred thirty-three thousand, four hundred six".