1289247941 has 2 divisors, whose sum is σ = 1289247942. Its totient is φ = 1289247940.

The previous prime is 1289247937. The next prime is 1289247959. The reversal of 1289247941 is 1497429821.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1271992225 + 17255716 = 35665^2 + 4154^2 .

It is an emirp because it is prime and its reverse (1497429821) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1289247941 - 2² = 1289247937 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1289247901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 644623970 + 644623971.

It is an arithmetic number, because the mean of its divisors is an integer number (644623971).

Almost surely, 2^1289247941 is an apocalyptic number.

It is an amenable number.

1289247941 is a deficient number, since it is larger than the sum of its proper divisors (1).

1289247941 is an equidigital number, since it uses as much as digits as its factorization.

1289247941 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 290304, while the sum is 47.

The square root of 1289247941 is about 35906.0989387597. The cubic root of 1289247941 is about 1088.3756466383.

The spelling of 1289247941 in words is "one billion, two hundred eighty-nine million, two hundred forty-seven thousand, nine hundred forty-one".