133564 has 6 divisors (see below), whose sum is σ = 233744. Its totient is φ = 66780.

The previous prime is 133559. The next prime is 133571. The reversal of 133564 is 465331.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16692 + ... + 16699.

2¹³³⁵⁶⁴ is an apocalyptic number.

It is an amenable number.

133564 is a deficient number, since it is larger than the sum of its proper divisors (100180).

133564 is a wasteful number, since it uses less digits than its factorization.

133564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33395 (or 33393 counting only the distinct ones).

The product of its digits is 1080, while the sum is 22.

The square root of 133564 is about 365.4640885231. The cubic root of 133564 is about 51.1167388608.

Adding to 133564 its reverse (465331), we get a palindrome (598895).

The spelling of 133564 in words is "one hundred thirty-three thousand, five hundred sixty-four".