133128132 has 12 divisors (see below), whose sum is σ = 310632336. Its totient is φ = 44376040.

The previous prime is 133128091. The next prime is 133128161. The reversal of 133128132 is 231821331.

It is a tau number, because it is divible by the number of its divisors (12).

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5546994 + ... + 5547017.

It is an arithmetic number, because the mean of its divisors is an integer number (25886028).

Almost surely, 2^133128132 is an apocalyptic number.

133128132 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

133128132 is an abundant number, since it is smaller than the sum of its proper divisors (177504204).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

133128132 is a wasteful number, since it uses less digits than its factorization.

133128132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11094018 (or 11094016 counting only the distinct ones).

The product of its digits is 864, while the sum is 24.

The square root of 133128132 is about 11538.1164840714. The cubic root of 133128132 is about 510.6107408375.

Adding to 133128132 its reverse (231821331), we get a palindrome (364949463).

The spelling of 133128132 in words is "one hundred thirty-three million, one hundred twenty-eight thousand, one hundred thirty-two".