42183921 has 12 divisors (see below), whose sum is σ = 60905328. Its totient is φ = 25959024.

The previous prime is 42183913. The next prime is 42183931. The reversal of 42183921 is 12938124.

42183921 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 42183921 - 2³ = 42183913 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42183931) 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 11 ways as a sum of consecutive naturals, for example, 41095 + ... + 42108.

It is an arithmetic number, because the mean of its divisors is an integer number (5075444).

Almost surely, 2^42183921 is an apocalyptic number.

It is an amenable number.

42183921 is a deficient number, since it is larger than the sum of its proper divisors (18721407).

42183921 is a wasteful number, since it uses less digits than its factorization.

42183921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83232 (or 83219 counting only the distinct ones).

The product of its digits is 3456, while the sum is 30.

The square root of 42183921 is about 6494.9150109913. The cubic root of 42183921 is about 348.1093179484.

The spelling of 42183921 in words is "forty-two million, one hundred eighty-three thousand, nine hundred twenty-one".