42023009 has 8 divisors (see below), whose sum is σ = 49324608. Its totient is φ = 35046000.

The previous prime is 42022999. The next prime is 42023039. The reversal of 42023009 is 90032024.

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 42023009 - 2¹² = 42018913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42023039) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 80867 + ... + 81384.

It is an arithmetic number, because the mean of its divisors is an integer number (6165576).

Almost surely, 2^42023009 is an apocalyptic number.

It is an amenable number.

42023009 is a deficient number, since it is larger than the sum of its proper divisors (7301599).

42023009 is a wasteful number, since it uses less digits than its factorization.

42023009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162295.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 42023009 is about 6482.5156382380. The cubic root of 42023009 is about 347.6661290095. Note that the first 3 decimals are identical.

The spelling of 42023009 in words is "forty-two million, twenty-three thousand, nine".