1252103472161 has 2 divisors, whose sum is σ = 1252103472162. Its totient is φ = 1252103472160.

The previous prime is 1252103472143. The next prime is 1252103472227. The reversal of 1252103472161 is 1612743012521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1111801536400 + 140301935761 = 1054420^2 + 374569^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1252103472161 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is not a weakly prime, because it can be changed into another prime (1252103472661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 626051736080 + 626051736081.

It is an arithmetic number, because the mean of its divisors is an integer number (626051736081).

Almost surely, 2^{1252103472161} is an apocalyptic number.

It is an amenable number.

1252103472161 is a deficient number, since it is larger than the sum of its proper divisors (1).

1252103472161 is an equidigital number, since it uses as much as digits as its factorization.

1252103472161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20160, while the sum is 35.

Adding to 1252103472161 its reverse (1612743012521), we get a palindrome (2864846484682).

The spelling of 1252103472161 in words is "one trillion, two hundred fifty-two billion, one hundred three million, four hundred seventy-two thousand, one hundred sixty-one".