242445409 has 4 divisors (see below), whose sum is σ = 242483200. Its totient is φ = 242407620.

The previous prime is 242445403. The next prime is 242445419. The reversal of 242445409 is 904544242.

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 a cyclic number.

It is not a de Polignac number, because 242445409 - 2⁹ = 242444897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (242445403) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6609 + ... + 22990.

It is an arithmetic number, because the mean of its divisors is an integer number (60620800).

Almost surely, 2^242445409 is an apocalyptic number.

It is an amenable number.

242445409 is a deficient number, since it is larger than the sum of its proper divisors (37791).

242445409 is an equidigital number, since it uses as much as digits as its factorization.

242445409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37790.

The product of its (nonzero) digits is 46080, while the sum is 34.

The square root of 242445409 is about 15570.6585923653. The cubic root of 242445409 is about 623.5500545342.

The spelling of 242445409 in words is "two hundred forty-two million, four hundred forty-five thousand, four hundred nine".