42675509 has 4 divisors (see below), whose sum is σ = 42741516. Its totient is φ = 42609504.

The previous prime is 42675481. The next prime is 42675517. The reversal of 42675509 is 90557624.

It is a happy number.

42675509 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.

It can be written as a sum of positive squares in 2 ways, for example, as 24850225 + 17825284 = 4985^2 + 4222^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42675509 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 (42675599) 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, 32024 + ... + 33329.

It is an arithmetic number, because the mean of its divisors is an integer number (10685379).

Almost surely, 2^42675509 is an apocalyptic number.

It is an amenable number.

42675509 is a deficient number, since it is larger than the sum of its proper divisors (66007).

42675509 is an equidigital number, since it uses as much as digits as its factorization.

42675509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66006.

The product of its (nonzero) digits is 75600, while the sum is 38.

The square root of 42675509 is about 6532.6494625075. The cubic root of 42675509 is about 349.4563232574.

The spelling of 42675509 in words is "forty-two million, six hundred seventy-five thousand, five hundred nine".