42247009 has 8 divisors (see below), whose sum is σ = 49101120. Its totient is φ = 35597616.

The previous prime is 42247001. The next prime is 42247019. The reversal of 42247009 is 90074224.

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 42247009 - 2³ = 42247001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42247001) 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, 50734 + ... + 51559.

It is an arithmetic number, because the mean of its divisors is an integer number (6137640).

Almost surely, 2^42247009 is an apocalyptic number.

It is an amenable number.

42247009 is a deficient number, since it is larger than the sum of its proper divisors (6854111).

42247009 is a wasteful number, since it uses less digits than its factorization.

42247009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102359.

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 42247009 is about 6499.7699190048. The cubic root of 42247009 is about 348.2827693572.

The spelling of 42247009 in words is "forty-two million, two hundred forty-seven thousand, nine".