1301256637487 has 2 divisors, whose sum is σ = 1301256637488. Its totient is φ = 1301256637486.

The previous prime is 1301256637451. The next prime is 1301256637517. The reversal of 1301256637487 is 7847366521031.

It is a strong prime.

It is an emirp because it is prime and its reverse (7847366521031) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1301256637487 - 2⁶ = 1301256637423 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1301256337487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 650628318743 + 650628318744.

It is an arithmetic number, because the mean of its divisors is an integer number (650628318744).

Almost surely, 2^{1301256637487} is an apocalyptic number.

1301256637487 is a deficient number, since it is larger than the sum of its proper divisors (1).

1301256637487 is an equidigital number, since it uses as much as digits as its factorization.

1301256637487 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5080320, while the sum is 53.

The spelling of 1301256637487 in words is "one trillion, three hundred one billion, two hundred fifty-six million, six hundred thirty-seven thousand, four hundred eighty-seven".