242006409 has 12 divisors (see below), whose sum is σ = 349825216. Its totient is φ = 161217432.

The previous prime is 242006399. The next prime is 242006417. The reversal of 242006409 is 904600242.

It is not a de Polignac number, because 242006409 - 2⁴ = 242006393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (242006449) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3732 + ... + 22314.

Almost surely, 2^242006409 is an apocalyptic number.

It is an amenable number.

242006409 is a deficient number, since it is larger than the sum of its proper divisors (107818807).

242006409 is a wasteful number, since it uses less digits than its factorization.

242006409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20036 (or 20033 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 242006409 is about 15556.5551778021. Note that the first 3 decimals coincide. The cubic root of 242006409 is about 623.1734696054.

The spelling of 242006409 in words is "two hundred forty-two million, six thousand, four hundred nine".