1217252908705 has 4 divisors (see below), whose sum is σ = 1460703490452. Its totient is φ = 973802326960.

The previous prime is 1217252908639. The next prime is 1217252908721. The reversal of 1217252908705 is 5078092527121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 251168361889 + 966084546816 = 501167^2 + 982896^2 .

It is not a de Polignac number, because 1217252908705 - 2¹¹ = 1217252906657 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 121725290866 + ... + 121725290875.

It is an arithmetic number, because the mean of its divisors is an integer number (365175872613).

Almost surely, 2^{1217252908705} is an apocalyptic number.

It is an amenable number.

1217252908705 is a deficient number, since it is larger than the sum of its proper divisors (243450581747).

1217252908705 is an equidigital number, since it uses as much as digits as its factorization.

1217252908705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243450581746.

The product of its (nonzero) digits is 705600, while the sum is 49.

The spelling of 1217252908705 in words is "one trillion, two hundred seventeen billion, two hundred fifty-two million, nine hundred eight thousand, seven hundred five".