133235921 has 8 divisors (see below), whose sum is σ = 163982784. Its totient is φ = 105417360.

The previous prime is 133235917. The next prime is 133235933. The reversal of 133235921 is 129532331.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 133235921 - 2² = 133235917 is a prime.

It is not an unprimeable number, because it can be changed into a prime (133235911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 731975 + ... + 732156.

It is an arithmetic number, because the mean of its divisors is an integer number (20497848).

Almost surely, 2^133235921 is an apocalyptic number.

It is an amenable number.

133235921 is a deficient number, since it is larger than the sum of its proper divisors (30746863).

133235921 is a wasteful number, since it uses less digits than its factorization.

133235921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1464151.

The product of its digits is 4860, while the sum is 29.

The square root of 133235921 is about 11542.7865353215. The cubic root of 133235921 is about 510.7485113018.

The spelling of 133235921 in words is "one hundred thirty-three million, two hundred thirty-five thousand, nine hundred twenty-one".