133646 has 8 divisors (see below), whose sum is σ = 211080. Its totient is φ = 63288.

The previous prime is 133633. The next prime is 133649. The reversal of 133646 is 646331.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×133646² = 35722506632, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133649) 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, 1721 + ... + 1796.

It is an arithmetic number, because the mean of its divisors is an integer number (26385).

2¹³³⁶⁴⁶ is an apocalyptic number.

133646 is a deficient number, since it is larger than the sum of its proper divisors (77434).

133646 is a wasteful number, since it uses less digits than its factorization.

133646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3538.

The product of its digits is 1296, while the sum is 23.

The square root of 133646 is about 365.5762574348. The cubic root of 133646 is about 51.1271975550.

Adding to 133646 its reverse (646331), we get a palindrome (779977).

The spelling of 133646 in words is "one hundred thirty-three thousand, six hundred forty-six".