1265260751273 has 2 divisors, whose sum is σ = 1265260751274. Its totient is φ = 1265260751272.

The previous prime is 1265260751257. The next prime is 1265260751303. The reversal of 1265260751273 is 3721570625621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1219109681689 + 46151069584 = 1104133^2 + 214828^2 .

It is a cyclic number.

It is not a de Polignac number, because 1265260751273 - 2⁴ = 1265260751257 is a prime.

It is a super-2 number, since 2×1265260751273² (a number of 25 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1265263751273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 632630375636 + 632630375637.

It is an arithmetic number, because the mean of its divisors is an integer number (632630375637).

Almost surely, 2^{1265260751273} is an apocalyptic number.

It is an amenable number.

1265260751273 is a deficient number, since it is larger than the sum of its proper divisors (1).

1265260751273 is an equidigital number, since it uses as much as digits as its factorization.

1265260751273 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1058400, while the sum is 47.

The spelling of 1265260751273 in words is "one trillion, two hundred sixty-five billion, two hundred sixty million, seven hundred fifty-one thousand, two hundred seventy-three".