242804405 has 4 divisors (see below), whose sum is σ = 291365292. Its totient is φ = 194243520.

The previous prime is 242804381. The next prime is 242804413. The reversal of 242804405 is 504408242.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 82047364 + 160757041 = 9058^2 + 12679^2 .

It is not a de Polignac number, because 242804405 - 2¹⁰ = 242803381 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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, 24280436 + ... + 24280445.

It is an arithmetic number, because the mean of its divisors is an integer number (72841323).

Almost surely, 2^242804405 is an apocalyptic number.

It is an amenable number.

242804405 is a deficient number, since it is larger than the sum of its proper divisors (48560887).

242804405 is an equidigital number, since it uses as much as digits as its factorization.

242804405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48560886.

The product of its (nonzero) digits is 10240, while the sum is 29.

The square root of 242804405 is about 15582.1822926059. The cubic root of 242804405 is about 623.8576723454.

The spelling of 242804405 in words is "two hundred forty-two million, eight hundred four thousand, four hundred five".