42239449 has 4 divisors (see below), whose sum is σ = 48273664. Its totient is φ = 36205236.

The previous prime is 42239443. The next prime is 42239473. The reversal of 42239449 is 94493224.

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 a cyclic number.

It is not a de Polignac number, because 42239449 - 2⁷ = 42239321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42239443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3017097 + ... + 3017110.

It is an arithmetic number, because the mean of its divisors is an integer number (12068416).

Almost surely, 2^42239449 is an apocalyptic number.

It is an amenable number.

42239449 is a deficient number, since it is larger than the sum of its proper divisors (6034215).

42239449 is an equidigital number, since it uses as much as digits as its factorization.

42239449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6034214.

The product of its digits is 62208, while the sum is 37.

The square root of 42239449 is about 6499.1883339383. The cubic root of 42239449 is about 348.2619933317.

The spelling of 42239449 in words is "forty-two million, two hundred thirty-nine thousand, four hundred forty-nine".