1303231001257 has 2 divisors, whose sum is σ = 1303231001258. Its totient is φ = 1303231001256.

The previous prime is 1303231001231. The next prime is 1303231001297. The reversal of 1303231001257 is 7521001323031.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 727781316201 + 575449685056 = 853101^2 + 758584^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1303231001257 is a prime.

It is a super-2 number, since 2×1303231001257² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1303231001207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 651615500628 + 651615500629.

It is an arithmetic number, because the mean of its divisors is an integer number (651615500629).

Almost surely, 2^{1303231001257} is an apocalyptic number.

It is an amenable number.

1303231001257 is a deficient number, since it is larger than the sum of its proper divisors (1).

1303231001257 is an equidigital number, since it uses as much as digits as its factorization.

1303231001257 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3780, while the sum is 28.

Adding to 1303231001257 its reverse (7521001323031), we get a palindrome (8824232324288).

The spelling of 1303231001257 in words is "one trillion, three hundred three billion, two hundred thirty-one million, one thousand, two hundred fifty-seven".