1305320011 has 4 divisors (see below), whose sum is σ = 1305484000. Its totient is φ = 1305156024.

The previous prime is 1305319933. The next prime is 1305320039. The reversal of 1305320011 is 1100235031.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1305320011 - 2¹¹ = 1305317963 is a prime.

It is a super-2 number, since 2×1305320011² = 3407720662234080242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1305320041) 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 3 ways as a sum of consecutive naturals, for example, 69411 + ... + 86188.

It is an arithmetic number, because the mean of its divisors is an integer number (326371000).

Almost surely, 2^1305320011 is an apocalyptic number.

1305320011 is a deficient number, since it is larger than the sum of its proper divisors (163989).

1305320011 is an equidigital number, since it uses as much as digits as its factorization.

1305320011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163988.

The product of its (nonzero) digits is 90, while the sum is 16.

The square root of 1305320011 is about 36129.2127093852. The cubic root of 1305320011 is about 1092.8796317283.

Adding to 1305320011 its reverse (1100235031), we get a palindrome (2405555042).

The spelling of 1305320011 in words is "one billion, three hundred five million, three hundred twenty thousand, eleven".