1305421423 has 2 divisors, whose sum is σ = 1305421424. Its totient is φ = 1305421422.

The previous prime is 1305421417. The next prime is 1305421471. The reversal of 1305421423 is 3241245031.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1305421423 - 2¹⁷ = 1305290351 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1305424423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 652710711 + 652710712.

It is an arithmetic number, because the mean of its divisors is an integer number (652710712).

Almost surely, 2^1305421423 is an apocalyptic number.

1305421423 is a deficient number, since it is larger than the sum of its proper divisors (1).

1305421423 is an equidigital number, since it uses as much as digits as its factorization.

1305421423 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 1305421423 is about 36130.6161447601. The cubic root of 1305421423 is about 1092.9079334061.

Adding to 1305421423 its reverse (3241245031), we get a palindrome (4546666454).

The spelling of 1305421423 in words is "one billion, three hundred five million, four hundred twenty-one thousand, four hundred twenty-three".