1312447325261 has 2 divisors, whose sum is σ = 1312447325262. Its totient is φ = 1312447325260.

The previous prime is 1312447325237. The next prime is 1312447325269. The reversal of 1312447325261 is 1625237442131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1269295156900 + 43152168361 = 1126630^2 + 207731^2 .

It is an emirp because it is prime and its reverse (1625237442131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1312447325261 - 2¹⁸ = 1312447063117 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1312447325269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 656223662630 + 656223662631.

It is an arithmetic number, because the mean of its divisors is an integer number (656223662631).

Almost surely, 2^{1312447325261} is an apocalyptic number.

It is an amenable number.

1312447325261 is a deficient number, since it is larger than the sum of its proper divisors (1).

1312447325261 is an equidigital number, since it uses as much as digits as its factorization.

1312447325261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 241920, while the sum is 41.

The spelling of 1312447325261 in words is "one trillion, three hundred twelve billion, four hundred forty-seven million, three hundred twenty-five thousand, two hundred sixty-one".