42165983 has 4 divisors (see below), whose sum is σ = 43526208. Its totient is φ = 40805760.

The previous prime is 42165947. The next prime is 42165989. The reversal of 42165983 is 38956124.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 42165983 - 2⁶ = 42165919 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42165989) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 680066 + ... + 680127.

It is an arithmetic number, because the mean of its divisors is an integer number (10881552).

Almost surely, 2^42165983 is an apocalyptic number.

42165983 is a deficient number, since it is larger than the sum of its proper divisors (1360225).

42165983 is a wasteful number, since it uses less digits than its factorization.

42165983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1360224.

The product of its digits is 51840, while the sum is 38.

The square root of 42165983 is about 6493.5339376953. The cubic root of 42165983 is about 348.0599684165.

The spelling of 42165983 in words is "forty-two million, one hundred sixty-five thousand, nine hundred eighty-three".