1320063257 has 2 divisors, whose sum is σ = 1320063258. Its totient is φ = 1320063256.

The previous prime is 1320063229. The next prime is 1320063259. The reversal of 1320063257 is 7523600231.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1269069376 + 50993881 = 35624^2 + 7141^2 .

It is a cyclic number.

It is not a de Polignac number, because 1320063257 - 2¹² = 1320059161 is a prime.

Together with 1320063259, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1320063259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660031628 + 660031629.

It is an arithmetic number, because the mean of its divisors is an integer number (660031629).

Almost surely, 2^1320063257 is an apocalyptic number.

It is an amenable number.

1320063257 is a deficient number, since it is larger than the sum of its proper divisors (1).

1320063257 is an equidigital number, since it uses as much as digits as its factorization.

1320063257 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7560, while the sum is 29.

The square root of 1320063257 is about 36332.6747845517. The cubic root of 1320063257 is about 1096.9788330555.

Adding to 1320063257 its reverse (7523600231), we get a palindrome (8843663488).

The spelling of 1320063257 in words is "one billion, three hundred twenty million, sixty-three thousand, two hundred fifty-seven".