133542612 has 72 divisors (see below), whose sum is σ = 387196992. Its totient is φ = 38016000.

The previous prime is 133542589. The next prime is 133542641. The reversal of 133542612 is 216245331.

133542612 is a `hidden beast` number, since 1 + 3 + 3 + 5 + 42 + 612 = 666.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 82612 + ... + 84212.

It is an arithmetic number, because the mean of its divisors is an integer number (5377736).

Almost surely, 2^133542612 is an apocalyptic number.

133542612 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 133542612, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (193598496).

133542612 is an abundant number, since it is smaller than the sum of its proper divisors (253654380).

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

133542612 is a wasteful number, since it uses less digits than its factorization.

133542612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1949 (or 1944 counting only the distinct ones).

The product of its digits is 4320, while the sum is 27.

The square root of 133542612 is about 11556.0638627519. The cubic root of 133542612 is about 511.1401022343.

Adding to 133542612 its reverse (216245331), we get a palindrome (349787943).

The spelling of 133542612 in words is "one hundred thirty-three million, five hundred forty-two thousand, six hundred twelve".