1305442247 has 2 divisors, whose sum is σ = 1305442248. Its totient is φ = 1305442246.

The previous prime is 1305442241. The next prime is 1305442277. The reversal of 1305442247 is 7422445031.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1305442247 - 2⁴ = 1305442231 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1305442241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 652721123 + 652721124.

It is an arithmetic number, because the mean of its divisors is an integer number (652721124).

Almost surely, 2^1305442247 is an apocalyptic number.

1305442247 is a deficient number, since it is larger than the sum of its proper divisors (1).

1305442247 is an equidigital number, since it uses as much as digits as its factorization.

1305442247 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 26880, while the sum is 32.

The square root of 1305442247 is about 36130.9043202630. The cubic root of 1305442247 is about 1092.9137447080.

Adding to 1305442247 its reverse (7422445031), we get a palindrome (8727887278).

The spelling of 1305442247 in words is "one billion, three hundred five million, four hundred forty-two thousand, two hundred forty-seven".