42207239 has 4 divisors (see below), whose sum is σ = 43003656. Its totient is φ = 41410824.

The previous prime is 42207223. The next prime is 42207247. The reversal of 42207239 is 93270224.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 42207239 - 2⁴ = 42207223 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42207259) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 398129 + ... + 398234.

It is an arithmetic number, because the mean of its divisors is an integer number (10750914).

Almost surely, 2^42207239 is an apocalyptic number.

42207239 is a deficient number, since it is larger than the sum of its proper divisors (796417).

42207239 is an equidigital number, since it uses as much as digits as its factorization.

42207239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 796416.

The product of its (nonzero) digits is 6048, while the sum is 29.

The square root of 42207239 is about 6496.7098596136. The cubic root of 42207239 is about 348.1734475795.

The spelling of 42207239 in words is "forty-two million, two hundred seven thousand, two hundred thirty-nine".