1305320502005 has 16 divisors (see below), whose sum is σ = 1687455851760. Its totient is φ = 963597485568.

The previous prime is 1305320501993. The next prime is 1305320502011. The reversal of 1305320502005 is 5002050235031.

It can be written as a sum of positive squares in 8 ways, for example, as 21524997796 + 1283795504209 = 146714^2 + 1133047^2 .

It is a cyclic number.

It is not a de Polignac number, because 1305320502005 - 2²⁰ = 1305319453429 is a prime.

It is a super-2 number, since 2×1305320502005² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3262592 + ... + 3640761.

It is an arithmetic number, because the mean of its divisors is an integer number (105465990735).

Almost surely, 2^{1305320502005} is an apocalyptic number.

It is an amenable number.

1305320502005 is a deficient number, since it is larger than the sum of its proper divisors (382135349755).

1305320502005 is a wasteful number, since it uses less digits than its factorization.

1305320502005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6906280.

The product of its (nonzero) digits is 4500, while the sum is 26.

Adding to 1305320502005 its reverse (5002050235031), we get a palindrome (6307370737036).

The spelling of 1305320502005 in words is "one trillion, three hundred five billion, three hundred twenty million, five hundred two thousand, five".