133972 has 6 divisors (see below), whose sum is σ = 234458. Its totient is φ = 66984.

The previous prime is 133967. The next prime is 133979. The reversal of 133972 is 279331.

It can be written as a sum of positive squares in only one way, i.e., 133956 + 16 = 366^2 + 4^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133979) by changing a digit.

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 as a sum of consecutive naturals, namely, 16743 + ... + 16750.

2¹³³⁹⁷² is an apocalyptic number.

It is an amenable number.

133972 is a deficient number, since it is larger than the sum of its proper divisors (100486).

133972 is a wasteful number, since it uses less digits than its factorization.

133972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33497 (or 33495 counting only the distinct ones).

The product of its digits is 1134, while the sum is 25.

The square root of 133972 is about 366.0218572708. The cubic root of 133972 is about 51.1687349811.

The spelling of 133972 in words is "one hundred thirty-three thousand, nine hundred seventy-two".