1265260751191 has 2 divisors, whose sum is σ = 1265260751192. Its totient is φ = 1265260751190.

The previous prime is 1265260751123. The next prime is 1265260751257. The reversal of 1265260751191 is 1911570625621.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1265260751191 - 2²⁵ = 1265227196759 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1265260751101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 632630375595 + 632630375596.

It is an arithmetic number, because the mean of its divisors is an integer number (632630375596).

Almost surely, 2^{1265260751191} is an apocalyptic number.

1265260751191 is a deficient number, since it is larger than the sum of its proper divisors (1).

1265260751191 is an equidigital number, since it uses as much as digits as its factorization.

1265260751191 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 226800, while the sum is 46.

The spelling of 1265260751191 in words is "one trillion, two hundred sixty-five billion, two hundred sixty million, seven hundred fifty-one thousand, one hundred ninety-one".