1312300131257 has 2 divisors, whose sum is σ = 1312300131258. Its totient is φ = 1312300131256.

The previous prime is 1312300131251. The next prime is 1312300131287. The reversal of 1312300131257 is 7521310032131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1086923013136 + 225377118121 = 1042556^2 + 474739^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1312300131257 is a prime.

It is not a weakly prime, because it can be changed into another prime (1312300131251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 656150065628 + 656150065629.

It is an arithmetic number, because the mean of its divisors is an integer number (656150065629).

Almost surely, 2^{1312300131257} is an apocalyptic number.

It is an amenable number.

1312300131257 is a deficient number, since it is larger than the sum of its proper divisors (1).

1312300131257 is an equidigital number, since it uses as much as digits as its factorization.

1312300131257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3780, while the sum is 29.

Adding to 1312300131257 its reverse (7521310032131), we get a palindrome (8833610163388).

The spelling of 1312300131257 in words is "one trillion, three hundred twelve billion, three hundred million, one hundred thirty-one thousand, two hundred fifty-seven".