242020009 has 8 divisors (see below), whose sum is σ = 301739328. Its totient is φ = 188586960.

The previous prime is 242019991. The next prime is 242020057. The reversal of 242020009 is 900020242.

It is a happy number.

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 242020009 - 2⁷ = 242019881 is a prime.

It is not an unprimeable number, because it can be changed into a prime (242020409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1571482 + ... + 1571635.

It is an arithmetic number, because the mean of its divisors is an integer number (37717416).

Almost surely, 2^242020009 is an apocalyptic number.

It is an amenable number.

242020009 is a deficient number, since it is larger than the sum of its proper divisors (59719319).

242020009 is a wasteful number, since it uses less digits than its factorization.

242020009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3143135.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 242020009 is about 15556.9922864286. The cubic root of 242020009 is about 623.1851428505.

The spelling of 242020009 in words is "two hundred forty-two million, twenty thousand, nine".