1320244304257 has 2 divisors, whose sum is σ = 1320244304258. Its totient is φ = 1320244304256.

The previous prime is 1320244304221. The next prime is 1320244304377. The reversal of 1320244304257 is 7524034420231.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 913507762176 + 406736542081 = 955776^2 + 637759^2 .

It is a cyclic number.

It is not a de Polignac number, because 1320244304257 - 2³¹ = 1318096820609 is a prime.

It is not a weakly prime, because it can be changed into another prime (1320244304207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660122152128 + 660122152129.

It is an arithmetic number, because the mean of its divisors is an integer number (660122152129).

Almost surely, 2^{1320244304257} is an apocalyptic number.

It is an amenable number.

1320244304257 is a deficient number, since it is larger than the sum of its proper divisors (1).

1320244304257 is an equidigital number, since it uses as much as digits as its factorization.

1320244304257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 161280, while the sum is 37.

Adding to 1320244304257 its reverse (7524034420231), we get a palindrome (8844278724488).

The spelling of 1320244304257 in words is "one trillion, three hundred twenty billion, two hundred forty-four million, three hundred four thousand, two hundred fifty-seven".