133568 has 14 divisors (see below), whose sum is σ = 265176. Its totient is φ = 66752.

The previous prime is 133559. The next prime is 133571. The reversal of 133568 is 865331.

It is a plaindrome in base 10.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 980 + ... + 1107.

2¹³³⁵⁶⁸ is an apocalyptic number.

It is an amenable number.

133568 is a deficient number, since it is larger than the sum of its proper divisors (131608).

133568 is an equidigital number, since it uses as much as digits as its factorization.

133568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2099 (or 2089 counting only the distinct ones).

The product of its digits is 2160, while the sum is 26.

The square root of 133568 is about 365.4695609760. The cubic root of 133568 is about 51.1172491403.

Adding to 133568 its reverse (865331), we get a palindrome (998899).

The spelling of 133568 in words is "one hundred thirty-three thousand, five hundred sixty-eight".