1265305868423 has 2 divisors, whose sum is σ = 1265305868424. Its totient is φ = 1265305868422.

The previous prime is 1265305868419. The next prime is 1265305868543. The reversal of 1265305868423 is 3248685035621.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1265305868423 - 2² = 1265305868419 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1265305864423) 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, 632652934211 + 632652934212.

It is an arithmetic number, because the mean of its divisors is an integer number (632652934212).

Almost surely, 2^{1265305868423} is an apocalyptic number.

1265305868423 is a deficient number, since it is larger than the sum of its proper divisors (1).

1265305868423 is an equidigital number, since it uses as much as digits as its factorization.

1265305868423 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8294400, while the sum is 53.

The spelling of 1265305868423 in words is "one trillion, two hundred sixty-five billion, three hundred five million, eight hundred sixty-eight thousand, four hundred twenty-three".