265243123 has 2 divisors, whose sum is σ = 265243124. Its totient is φ = 265243122.

The previous prime is 265243117. The next prime is 265243157. The reversal of 265243123 is 321342562.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-265243123 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 265243091 and 265243100.

It is not a weakly prime, because it can be changed into another prime (265243423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132621561 + 132621562.

It is an arithmetic number, because the mean of its divisors is an integer number (132621562).

Almost surely, 2^265243123 is an apocalyptic number.

265243123 is a deficient number, since it is larger than the sum of its proper divisors (1).

265243123 is an equidigital number, since it uses as much as digits as its factorization.

265243123 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8640, while the sum is 28.

The square root of 265243123 is about 16286.2863477221. The cubic root of 265243123 is about 642.5121986914.

Adding to 265243123 its reverse (321342562), we get a palindrome (586585685).

The spelling of 265243123 in words is "two hundred sixty-five million, two hundred forty-three thousand, one hundred twenty-three".