243126345 has 32 divisors (see below), whose sum is σ = 484992000. Its totient is φ = 101039040.

The previous prime is 243126319. The next prime is 243126349. The reversal of 243126345 is 543621342.

It is not a de Polignac number, because 243126345 - 2¹³ = 243118153 is a prime.

It is a super-2 number, since 2×243126345² = 118220839266118050, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (243126349) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 104095 + ... + 106404.

It is an arithmetic number, because the mean of its divisors is an integer number (15156000).

Almost surely, 2^243126345 is an apocalyptic number.

It is an amenable number.

243126345 is a deficient number, since it is larger than the sum of its proper divisors (241865655).

243126345 is a wasteful number, since it uses less digits than its factorization.

243126345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210525.

The product of its digits is 17280, while the sum is 30.

The square root of 243126345 is about 15592.5092592565. The cubic root of 243126345 is about 624.1332796957.

Adding to 243126345 its reverse (543621342), we get a palindrome (786747687).

The spelling of 243126345 in words is "two hundred forty-three million, one hundred twenty-six thousand, three hundred forty-five".