133660542 has 16 divisors (see below), whose sum is σ = 267821712. Its totient is φ = 44470080.

The previous prime is 133660531. The next prime is 133660589. The reversal of 133660542 is 245066331.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17343 + ... + 23834.

It is an arithmetic number, because the mean of its divisors is an integer number (16738857).

Almost surely, 2^133660542 is an apocalyptic number.

133660542 is an abundant number, since it is smaller than the sum of its proper divisors (134161170).

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

133660542 is a wasteful number, since it uses less digits than its factorization.

133660542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41723.

The product of its (nonzero) digits is 12960, while the sum is 30.

The square root of 133660542 is about 11561.1652526897. The cubic root of 133660542 is about 511.2905186849.

It can be divided in two parts, 133 and 660542, that added together give a triangular number (660675 = T₁₁₄₉).

The spelling of 133660542 in words is "one hundred thirty-three million, six hundred sixty thousand, five hundred forty-two".