1262138217397 has 2 divisors, whose sum is σ = 1262138217398. Its totient is φ = 1262138217396.

The previous prime is 1262138217377. The next prime is 1262138217437. The reversal of 1262138217397 is 7937128312621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1034775183121 + 227363034276 = 1017239^2 + 476826^2 .

It is a cyclic number.

It is not a de Polignac number, because 1262138217397 - 2²³ = 1262129828789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1262138217377) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 631069108698 + 631069108699.

It is an arithmetic number, because the mean of its divisors is an integer number (631069108699).

Almost surely, 2^{1262138217397} is an apocalyptic number.

It is an amenable number.

1262138217397 is a deficient number, since it is larger than the sum of its proper divisors (1).

1262138217397 is an equidigital number, since it uses as much as digits as its factorization.

1262138217397 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1524096, while the sum is 52.

The spelling of 1262138217397 in words is "one trillion, two hundred sixty-two billion, one hundred thirty-eight million, two hundred seventeen thousand, three hundred ninety-seven".