42600009 has 4 divisors (see below), whose sum is σ = 56800016. Its totient is φ = 28400004.

The previous prime is 42599993. The next prime is 42600023. The reversal of 42600009 is 90000624.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 42600009 - 2⁴ = 42599993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42600029) 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, 7099999 + ... + 7100004.

It is an arithmetic number, because the mean of its divisors is an integer number (14200004).

Almost surely, 2^42600009 is an apocalyptic number.

It is an amenable number.

42600009 is a deficient number, since it is larger than the sum of its proper divisors (14200007).

42600009 is a wasteful number, since it uses less digits than its factorization.

42600009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14200006.

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 42600009 is about 6526.8682382901. The cubic root of 42600009 is about 349.2501196875.

The spelling of 42600009 in words is "forty-two million, six hundred thousand, nine".