42207009 has 8 divisors (see below), whose sum is σ = 60604992. Its totient is φ = 25973520.

The previous prime is 42206929. The next prime is 42207017. The reversal of 42207009 is 90070224.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 42207009 - 2⁷ = 42206881 is a prime.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 42207009.

It is not an unprimeable number, because it can be changed into a prime (42207049) 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, 541077 + ... + 541154.

It is an arithmetic number, because the mean of its divisors is an integer number (7575624).

Almost surely, 2^42207009 is an apocalyptic number.

It is an amenable number.

42207009 is a deficient number, since it is larger than the sum of its proper divisors (18397983).

42207009 is a wasteful number, since it uses less digits than its factorization.

42207009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1082247.

The product of its (nonzero) digits is 1008, while the sum is 24.

The square root of 42207009 is about 6496.6921583218. The cubic root of 42207009 is about 348.1728151443.

The spelling of 42207009 in words is "forty-two million, two hundred seven thousand, nine".