1252541243249 has 2 divisors, whose sum is σ = 1252541243250. Its totient is φ = 1252541243248.

The previous prime is 1252541243167. The next prime is 1252541243309. The reversal of 1252541243249 is 9423421452521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1037022465649 + 215518777600 = 1018343^2 + 464240^2 .

It is a cyclic number.

It is not a de Polignac number, because 1252541243249 - 2³² = 1248246275953 is a prime.

It is not a weakly prime, because it can be changed into another prime (1252543243249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 626270621624 + 626270621625.

It is an arithmetic number, because the mean of its divisors is an integer number (626270621625).

Almost surely, 2^{1252541243249} is an apocalyptic number.

It is an amenable number.

1252541243249 is a deficient number, since it is larger than the sum of its proper divisors (1).

1252541243249 is an equidigital number, since it uses as much as digits as its factorization.

1252541243249 is an evil number, because the sum of its binary digits is even.

The product of its digits is 691200, while the sum is 44.

The spelling of 1252541243249 in words is "one trillion, two hundred fifty-two billion, five hundred forty-one million, two hundred forty-three thousand, two hundred forty-nine".