242287009 has 8 divisors (see below), whose sum is σ = 261380520. Its totient is φ = 223731456.

The previous prime is 242286997. The next prime is 242287013. The reversal of 242287009 is 900782242.

It can be written as a sum of positive squares in 4 ways, for example, as 20277009 + 222010000 = 4503^2 + 14900^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 242287009 - 2⁷ = 242286881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (242287079) 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, 133554 + ... + 135355.

It is an arithmetic number, because the mean of its divisors is an integer number (32672565).

Almost surely, 2^242287009 is an apocalyptic number.

It is an amenable number.

242287009 is a deficient number, since it is larger than the sum of its proper divisors (19093511).

242287009 is a wasteful number, since it uses less digits than its factorization.

242287009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 268979.

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 242287009 is about 15565.5712712383. The cubic root of 242287009 is about 623.4142276043.

The spelling of 242287009 in words is "two hundred forty-two million, two hundred eighty-seven thousand, nine".