1252523307569 has 2 divisors, whose sum is σ = 1252523307570. Its totient is φ = 1252523307568.

The previous prime is 1252523307551. The next prime is 1252523307611. The reversal of 1252523307569 is 9657033252521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1229049390625 + 23473916944 = 1108625^2 + 153212^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1252523307569 is a prime.

It is a super-2 number, since 2×1252523307569² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1252523301569) 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, 626261653784 + 626261653785.

It is an arithmetic number, because the mean of its divisors is an integer number (626261653785).

Almost surely, 2^{1252523307569} is an apocalyptic number.

It is an amenable number.

1252523307569 is a deficient number, since it is larger than the sum of its proper divisors (1).

1252523307569 is an equidigital number, since it uses as much as digits as its factorization.

1252523307569 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3402000, while the sum is 50.

The spelling of 1252523307569 in words is "one trillion, two hundred fifty-two billion, five hundred twenty-three million, three hundred seven thousand, five hundred sixty-nine".