1306259268889 has 3 divisors (see below), whose sum is σ = 1306260411807. Its totient is φ = 1306258125972.

The previous prime is 1306259268877. The next prime is 1306259268949. The reversal of 1306259268889 is 9888629526031.

It is a happy number.

The square root of 1306259268889 is 1142917.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 1276436742025 + 29822526864 = 1129795^2 + 172692^2 .

It is not a de Polignac number, because 1306259268889 - 2²⁵ = 1306225714457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1306259268389) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 571459 + ... + 1714375.

It is an arithmetic number, because the mean of its divisors is an integer number (435420137269).

Almost surely, 2^{1306259268889} is an apocalyptic number.

1306259268889 is the 1142917-th square number.

1306259268889 is the 571459-th centered octagonal number.

It is an amenable number.

1306259268889 is a deficient number, since it is larger than the sum of its proper divisors (1142918).

1306259268889 is an frugal number, since it uses more digits than its factorization.

1306259268889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2285834 (or 1142917 counting only the distinct ones).

The product of its (nonzero) digits is 89579520, while the sum is 67.

The spelling of 1306259268889 in words is "one trillion, three hundred six billion, two hundred fifty-nine million, two hundred sixty-eight thousand, eight hundred eighty-nine".