1237013681257 has 2 divisors, whose sum is σ = 1237013681258. Its totient is φ = 1237013681256.

The previous prime is 1237013681251. The next prime is 1237013681273. The reversal of 1237013681257 is 7521863107321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 860759028441 + 376254652816 = 927771^2 + 613396^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1237013681257 is a prime.

It is not a weakly prime, because it can be changed into another prime (1237013681251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 618506840628 + 618506840629.

It is an arithmetic number, because the mean of its divisors is an integer number (618506840629).

Almost surely, 2^{1237013681257} is an apocalyptic number.

It is an amenable number.

1237013681257 is a deficient number, since it is larger than the sum of its proper divisors (1).

1237013681257 is an equidigital number, since it uses as much as digits as its factorization.

1237013681257 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 423360, while the sum is 46.

Adding to 1237013681257 its reverse (7521863107321), we get a palindrome (8758876788578).

The spelling of 1237013681257 in words is "one trillion, two hundred thirty-seven billion, thirteen million, six hundred eighty-one thousand, two hundred fifty-seven".