1305281260009 has 8 divisors (see below), whose sum is σ = 1362240439560. Its totient is φ = 1249118712576.

The previous prime is 1305281259991. The next prime is 1305281260097. The reversal of 1305281260009 is 9000621825031.

It can be written as a sum of positive squares in 4 ways, for example, as 6599937600 + 1298681322409 = 81240^2 + 1139597^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1305281260009 - 2⁹ = 1305281259497 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1305281260009.

It is not an unprimeable number, because it can be changed into a prime (1305281260909) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 199154682 + ... + 199161235.

It is an arithmetic number, because the mean of its divisors is an integer number (170280054945).

Almost surely, 2^{1305281260009} is an apocalyptic number.

It is an amenable number.

1305281260009 is a deficient number, since it is larger than the sum of its proper divisors (56959179551).

1305281260009 is a wasteful number, since it uses less digits than its factorization.

1305281260009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 398316059.

The product of its (nonzero) digits is 25920, while the sum is 37.

The spelling of 1305281260009 in words is "one trillion, three hundred five billion, two hundred eighty-one million, two hundred sixty thousand, nine".