42288609 has 16 divisors (see below), whose sum is σ = 61642944. Its totient is φ = 25574400.

The previous prime is 42288601. The next prime is 42288691. The reversal of 42288609 is 90688224.

It is not a de Polignac number, because 42288609 - 2³ = 42288601 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42288601) 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 15 ways as a sum of consecutive naturals, for example, 18489 + ... + 20649.

It is an arithmetic number, because the mean of its divisors is an integer number (3852684).

Almost surely, 2^42288609 is an apocalyptic number.

It is an amenable number.

42288609 is a deficient number, since it is larger than the sum of its proper divisors (19354335).

42288609 is a wasteful number, since it uses less digits than its factorization.

42288609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2768.

The product of its (nonzero) digits is 55296, while the sum is 39.

The square root of 42288609 is about 6502.9692448911. The cubic root of 42288609 is about 348.3970481396.

The spelling of 42288609 in words is "forty-two million, two hundred eighty-eight thousand, six hundred nine".