42118009 has 8 divisors (see below), whose sum is σ = 42977088. Its totient is φ = 41265840.

The previous prime is 42117997. The next prime is 42118019. The reversal of 42118009 is 90081124.

It is a happy number.

42118009 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 42118009 - 2¹¹ = 42115961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42118019) 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, 11604 + ... + 14794.

It is an arithmetic number, because the mean of its divisors is an integer number (5372136).

Almost surely, 2^42118009 is an apocalyptic number.

It is an amenable number.

42118009 is a deficient number, since it is larger than the sum of its proper divisors (859079).

42118009 is a wasteful number, since it uses less digits than its factorization.

42118009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3455.

The product of its (nonzero) digits is 576, while the sum is 25.

The square root of 42118009 is about 6489.8389040099. The cubic root of 42118009 is about 347.9279175361.

The spelling of 42118009 in words is "forty-two million, one hundred eighteen thousand, nine".