242609 has 8 divisors (see below), whose sum is σ = 255360. Its totient is φ = 230256.

The previous prime is 242603. The next prime is 242617. The reversal of 242609 is 906242.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-242609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (242603) 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 7 ways as a sum of consecutive naturals, for example, 2882 + ... + 2964.

It is an arithmetic number, because the mean of its divisors is an integer number (31920).

2²⁴²⁶⁰⁹ is an apocalyptic number.

It is an amenable number.

242609 is a deficient number, since it is larger than the sum of its proper divisors (12751).

242609 is an equidigital number, since it uses as much as digits as its factorization.

242609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 242609 is about 492.5535503882. The cubic root of 242609 is about 62.3690270625.

The spelling of 242609 in words is "two hundred forty-two thousand, six hundred nine".