243125123 has 2 divisors, whose sum is σ = 243125124. Its totient is φ = 243125122.

The previous prime is 243125119. The next prime is 243125137. The reversal of 243125123 is 321521342.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 243125123 - 2² = 243125119 is a prime.

It is not a weakly prime, because it can be changed into another prime (243125153) 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 as a sum of consecutive naturals, namely, 121562561 + 121562562.

It is an arithmetic number, because the mean of its divisors is an integer number (121562562).

Almost surely, 2^243125123 is an apocalyptic number.

243125123 is a deficient number, since it is larger than the sum of its proper divisors (1).

243125123 is an equidigital number, since it uses as much as digits as its factorization.

243125123 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1440, while the sum is 23.

The square root of 243125123 is about 15592.4700737247. The cubic root of 243125123 is about 624.1322340225.

Adding to 243125123 its reverse (321521342), we get a palindrome (564646465).

The spelling of 243125123 in words is "two hundred forty-three million, one hundred twenty-five thousand, one hundred twenty-three".