242458409 has 4 divisors (see below), whose sum is σ = 250279680. Its totient is φ = 234637140.

The previous prime is 242458393. The next prime is 242458417. The reversal of 242458409 is 904854242.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 242458409 - 2⁴ = 242458393 is a prime.

It is a super-2 number, since 2×242458409² = 117572160189622562, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (242458429) 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 3 ways as a sum of consecutive naturals, for example, 3910589 + ... + 3910650.

It is an arithmetic number, because the mean of its divisors is an integer number (62569920).

Almost surely, 2^242458409 is an apocalyptic number.

It is an amenable number.

242458409 is a deficient number, since it is larger than the sum of its proper divisors (7821271).

242458409 is an equidigital number, since it uses as much as digits as its factorization.

242458409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7821270.

The product of its (nonzero) digits is 92160, while the sum is 38.

The square root of 242458409 is about 15571.0760386044. The cubic root of 242458409 is about 623.5611993192.

The spelling of 242458409 in words is "two hundred forty-two million, four hundred fifty-eight thousand, four hundred nine".