1376253251257 has 2 divisors, whose sum is σ = 1376253251258. Its totient is φ = 1376253251256.

The previous prime is 1376253251237. The next prime is 1376253251267. The reversal of 1376253251257 is 7521523526731.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1262411792041 + 113841459216 = 1123571^2 + 337404^2 .

It is an emirp because it is prime and its reverse (7521523526731) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1376253251257 - 2¹⁵ = 1376253218489 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1376253251257.

It is not a weakly prime, because it can be changed into another prime (1376253251237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 688126625628 + 688126625629.

It is an arithmetic number, because the mean of its divisors is an integer number (688126625629).

Almost surely, 2^{1376253251257} is an apocalyptic number.

It is an amenable number.

1376253251257 is a deficient number, since it is larger than the sum of its proper divisors (1).

1376253251257 is an equidigital number, since it uses as much as digits as its factorization.

1376253251257 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2646000, while the sum is 49.

Adding to 1376253251257 its reverse (7521523526731), we get a palindrome (8897776777988).

The spelling of 1376253251257 in words is "one trillion, three hundred seventy-six billion, two hundred fifty-three million, two hundred fifty-one thousand, two hundred fifty-seven".