133156 has 6 divisors (see below), whose sum is σ = 233030. Its totient is φ = 66576.

The previous prime is 133153. The next prime is 133157. The reversal of 133156 is 651331.

It can be written as a sum of positive squares in only one way, i.e., 78400 + 54756 = 280^2 + 234^2 .

It is not an unprimeable number, because it can be changed into a prime (133153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16641 + ... + 16648.

2¹³³¹⁵⁶ is an apocalyptic number.

It is an amenable number.

133156 is a deficient number, since it is larger than the sum of its proper divisors (99874).

133156 is a wasteful number, since it uses less digits than its factorization.

133156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33293 (or 33291 counting only the distinct ones).

The product of its digits is 270, while the sum is 19.

The square root of 133156 is about 364.9054672103. The cubic root of 133156 is about 51.0646367436.

Adding to 133156 its reverse (651331), we get a palindrome (784487).

It can be divided in two parts, 133 and 156, that added together give a square (289 = 17²).

The spelling of 133156 in words is "one hundred thirty-three thousand, one hundred fifty-six".