42245609 has 4 divisors (see below), whose sum is σ = 48280704. Its totient is φ = 36210516.

The previous prime is 42245563. The next prime is 42245617. The reversal of 42245609 is 90654224.

42245609 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 42245609 - 2⁸ = 42245353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42245669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3017537 + ... + 3017550.

It is an arithmetic number, because the mean of its divisors is an integer number (12070176).

Almost surely, 2^42245609 is an apocalyptic number.

It is an amenable number.

42245609 is a deficient number, since it is larger than the sum of its proper divisors (6035095).

42245609 is an equidigital number, since it uses as much as digits as its factorization.

42245609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6035094.

The product of its (nonzero) digits is 17280, while the sum is 32.

The square root of 42245609 is about 6499.6622219928. The cubic root of 42245609 is about 348.2789221321.

The spelling of 42245609 in words is "forty-two million, two hundred forty-five thousand, six hundred nine".