1252421532169 has 2 divisors, whose sum is σ = 1252421532170. Its totient is φ = 1252421532168.

The previous prime is 1252421532151. The next prime is 1252421532251. The reversal of 1252421532169 is 9612351242521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 973600570944 + 278820961225 = 986712^2 + 528035^2 .

It is a cyclic number.

It is not a de Polignac number, because 1252421532169 - 2¹⁷ = 1252421401097 is a prime.

It is a super-2 number, since 2×1252421532169² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1252421532469) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 626210766084 + 626210766085.

It is an arithmetic number, because the mean of its divisors is an integer number (626210766085).

Almost surely, 2^{1252421532169} is an apocalyptic number.

It is an amenable number.

1252421532169 is a deficient number, since it is larger than the sum of its proper divisors (1).

1252421532169 is an equidigital number, since it uses as much as digits as its factorization.

1252421532169 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 259200, while the sum is 43.

The spelling of 1252421532169 in words is "one trillion, two hundred fifty-two billion, four hundred twenty-one million, five hundred thirty-two thousand, one hundred sixty-nine".