133604 has 12 divisors (see below), whose sum is σ = 236544. Its totient is φ = 66024.

The previous prime is 133597. The next prime is 133631. The reversal of 133604 is 406331.

133604 is nontrivially palindromic in base 11.

It is an unprimeable number.

133604 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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 3 ways as a sum of consecutive naturals, for example, 377 + ... + 639.

It is an arithmetic number, because the mean of its divisors is an integer number (19712).

2¹³³⁶⁰⁴ is an apocalyptic number.

It is an amenable number.

133604 is a deficient number, since it is larger than the sum of its proper divisors (102940).

133604 is a wasteful number, since it uses less digits than its factorization.

133604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 394 (or 392 counting only the distinct ones).

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

The square root of 133604 is about 365.5188093655. The cubic root of 133604 is about 51.1218411975.

Adding to 133604 its reverse (406331), we get a palindrome (539935).

It can be divided in two parts, 133 and 604, that added together give a palindrome (737).

The spelling of 133604 in words is "one hundred thirty-three thousand, six hundred four".