1305321023 has 2 divisors, whose sum is σ = 1305321024. Its totient is φ = 1305321022.

The previous prime is 1305321019. The next prime is 1305321037. The reversal of 1305321023 is 3201235031.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1305321023 - 2² = 1305321019 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1305320986 and 1305321004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1305321923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 652660511 + 652660512.

It is an arithmetic number, because the mean of its divisors is an integer number (652660512).

Almost surely, 2^1305321023 is an apocalyptic number.

1305321023 is a deficient number, since it is larger than the sum of its proper divisors (1).

1305321023 is an equidigital number, since it uses as much as digits as its factorization.

1305321023 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 540, while the sum is 20.

The square root of 1305321023 is about 36129.2267146697. The cubic root of 1305321023 is about 1092.8799141607.

Adding to 1305321023 its reverse (3201235031), we get a palindrome (4506556054).

The spelling of 1305321023 in words is "one billion, three hundred five million, three hundred twenty-one thousand, twenty-three".