1225653123517 has 2 divisors, whose sum is σ = 1225653123518. Its totient is φ = 1225653123516.

The previous prime is 1225653123481. The next prime is 1225653123557. The reversal of 1225653123517 is 7153213565221.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1211553698436 + 14099425081 = 1100706^2 + 118741^2 .

It is a cyclic number.

It is not a de Polignac number, because 1225653123517 - 2⁷ = 1225653123389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1225653123557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 612826561758 + 612826561759.

It is an arithmetic number, because the mean of its divisors is an integer number (612826561759).

Almost surely, 2^{1225653123517} is an apocalyptic number.

It is an amenable number.

1225653123517 is a deficient number, since it is larger than the sum of its proper divisors (1).

1225653123517 is an equidigital number, since it uses as much as digits as its factorization.

1225653123517 is an evil number, because the sum of its binary digits is even.

The product of its digits is 378000, while the sum is 43.

Adding to 1225653123517 its reverse (7153213565221), we get a palindrome (8378866688738).

The spelling of 1225653123517 in words is "one trillion, two hundred twenty-five billion, six hundred fifty-three million, one hundred twenty-three thousand, five hundred seventeen".