1213525187417 has 2 divisors, whose sum is σ = 1213525187418. Its totient is φ = 1213525187416.

The previous prime is 1213525187411. The next prime is 1213525187429. The reversal of 1213525187417 is 7147815253121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1023878873161 + 189646314256 = 1011869^2 + 435484^2 .

It is an emirp because it is prime and its reverse (7147815253121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1213525187417 - 2²⁴ = 1213508410201 is a prime.

It is not a weakly prime, because it can be changed into another prime (1213525187411) 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, 606762593708 + 606762593709.

It is an arithmetic number, because the mean of its divisors is an integer number (606762593709).

Almost surely, 2^{1213525187417} is an apocalyptic number.

It is an amenable number.

1213525187417 is a deficient number, since it is larger than the sum of its proper divisors (1).

1213525187417 is an equidigital number, since it uses as much as digits as its factorization.

1213525187417 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 470400, while the sum is 47.

The spelling of 1213525187417 in words is "one trillion, two hundred thirteen billion, five hundred twenty-five million, one hundred eighty-seven thousand, four hundred seventeen".