1305500513 has 4 divisors (see below), whose sum is σ = 1307795460. Its totient is φ = 1303205568.

The previous prime is 1305500503. The next prime is 1305500519. The reversal of 1305500513 is 3150055031.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3150055031 = 45523 ⋅69197.

It can be written as a sum of positive squares in 2 ways, for example, as 362826304 + 942674209 = 19048^2 + 30703^2 .

It is a cyclic number.

It is not a de Polignac number, because 1305500513 - 2¹² = 1305496417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1305500519) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1146620 + ... + 1147757.

It is an arithmetic number, because the mean of its divisors is an integer number (326948865).

Almost surely, 2^1305500513 is an apocalyptic number.

It is an amenable number.

1305500513 is a deficient number, since it is larger than the sum of its proper divisors (2294947).

1305500513 is an equidigital number, since it uses as much as digits as its factorization.

1305500513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2294946.

The product of its (nonzero) digits is 1125, while the sum is 23.

The square root of 1305500513 is about 36131.7106293073. The cubic root of 1305500513 is about 1092.9300045272.

Adding to 1305500513 its reverse (3150055031), we get a palindrome (4455555544).

The spelling of 1305500513 in words is "one billion, three hundred five million, five hundred thousand, five hundred thirteen".