42128933 has 12 divisors (see below), whose sum is σ = 52923360. Its totient is φ = 32827080.

The previous prime is 42128929. The next prime is 42128971. The reversal of 42128933 is 33982124.

It is a happy number.

It is not a de Polignac number, because 42128933 - 2² = 42128929 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 42128933.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42128633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 24023 + ... + 25716.

It is an arithmetic number, because the mean of its divisors is an integer number (4410280).

Almost surely, 2^42128933 is an apocalyptic number.

It is an amenable number.

42128933 is a deficient number, since it is larger than the sum of its proper divisors (10794427).

42128933 is a wasteful number, since it uses less digits than its factorization.

42128933 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49768 (or 49757 counting only the distinct ones).

The product of its digits is 10368, while the sum is 32.

The square root of 42128933 is about 6490.6804728010. The cubic root of 42128933 is about 347.9579952163.

The spelling of 42128933 in words is "forty-two million, one hundred twenty-eight thousand, nine hundred thirty-three".