1265260751259 has 4 divisors (see below), whose sum is σ = 1687014335016. Its totient is φ = 843507167504.

The previous prime is 1265260751257. The next prime is 1265260751273. The reversal of 1265260751259 is 9521570625621.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1265260751259 - 2¹ = 1265260751257 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1265260751257) 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 in 3 ways as a sum of consecutive naturals, for example, 210876791874 + ... + 210876791879.

It is an arithmetic number, because the mean of its divisors is an integer number (421753583754).

Almost surely, 2^{1265260751259} is an apocalyptic number.

1265260751259 is a deficient number, since it is larger than the sum of its proper divisors (421753583757).

1265260751259 is an equidigital number, since it uses as much as digits as its factorization.

1265260751259 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 421753583756.

The product of its (nonzero) digits is 2268000, while the sum is 51.

The spelling of 1265260751259 in words is "one trillion, two hundred sixty-five billion, two hundred sixty million, seven hundred fifty-one thousand, two hundred fifty-nine".