1305423420205 has 8 divisors (see below), whose sum is σ = 1588571599104. Its totient is φ = 1029629739600.

The previous prime is 1305423420149. The next prime is 1305423420211. The reversal of 1305423420205 is 5020243245031.

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

It is not a de Polignac number, because 1305423420205 - 2¹¹ = 1305423418157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1838624181 + ... + 1838624890.

It is an arithmetic number, because the mean of its divisors is an integer number (198571449888).

Almost surely, 2^{1305423420205} is an apocalyptic number.

It is an amenable number.

1305423420205 is a deficient number, since it is larger than the sum of its proper divisors (283148178899).

1305423420205 is an equidigital number, since it uses as much as digits as its factorization.

1305423420205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3677249147.

The product of its (nonzero) digits is 28800, while the sum is 31.

Adding to 1305423420205 its reverse (5020243245031), we get a palindrome (6325666665236).

The spelling of 1305423420205 in words is "one trillion, three hundred five billion, four hundred twenty-three million, four hundred twenty thousand, two hundred five".