243040605 has 32 divisors (see below), whose sum is σ = 402192000. Its totient is φ = 125229312.

The previous prime is 243040559. The next prime is 243040613. The reversal of 243040605 is 506040342.

It is not a de Polignac number, because 243040605 - 2⁷ = 243040477 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 81226 + ... + 84164.

It is an arithmetic number, because the mean of its divisors is an integer number (12568500).

Almost surely, 2^243040605 is an apocalyptic number.

It is an amenable number.

243040605 is a deficient number, since it is larger than the sum of its proper divisors (159151395).

243040605 is a wasteful number, since it uses less digits than its factorization.

243040605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3133.

The product of its (nonzero) digits is 2880, while the sum is 24.

The square root of 243040605 is about 15589.7596196991. The cubic root of 243040605 is about 624.0599029236.

Adding to 243040605 its reverse (506040342), we get a palindrome (749080947).

The spelling of 243040605 in words is "two hundred forty-three million, forty thousand, six hundred five".