1305261674989 has 2 divisors, whose sum is σ = 1305261674990. Its totient is φ = 1305261674988.

The previous prime is 1305261674987. The next prime is 1305261675049. The reversal of 1305261674989 is 9894761625031.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 696752470089 + 608509204900 = 834717^2 + 780070^2 .

It is a cyclic number.

It is not a de Polignac number, because 1305261674989 - 2¹ = 1305261674987 is a prime.

Together with 1305261674987, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1305261674987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 652630837494 + 652630837495.

It is an arithmetic number, because the mean of its divisors is an integer number (652630837495).

It is a 3-persistent number, because k⋅1305261674989 is pandigital for 1 ≤ k ≤ 3, but not for k = 4.

Almost surely, 2^{1305261674989} is an apocalyptic number.

It is an amenable number.

1305261674989 is a deficient number, since it is larger than the sum of its proper divisors (1).

1305261674989 is an equidigital number, since it uses as much as digits as its factorization.

1305261674989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19595520, while the sum is 61.

The spelling of 1305261674989 in words is "one trillion, three hundred five billion, two hundred sixty-one million, six hundred seventy-four thousand, nine hundred eighty-nine".