1252520317 has 2 divisors, whose sum is σ = 1252520318. Its totient is φ = 1252520316.

The previous prime is 1252520303. The next prime is 1252520323. The reversal of 1252520317 is 7130252521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1212502041 + 40018276 = 34821^2 + 6326^2 .

It is a cyclic number.

It is not a de Polignac number, because 1252520317 - 2¹¹ = 1252518269 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1252520117) 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, 626260158 + 626260159.

It is an arithmetic number, because the mean of its divisors is an integer number (626260159).

Almost surely, 2^1252520317 is an apocalyptic number.

It is an amenable number.

1252520317 is a deficient number, since it is larger than the sum of its proper divisors (1).

1252520317 is an equidigital number, since it uses as much as digits as its factorization.

1252520317 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4200, while the sum is 28.

The square root of 1252520317 is about 35390.9637760827. The cubic root of 1252520317 is about 1077.9408401004.

Adding to 1252520317 its reverse (7130252521), we get a palindrome (8382772838).

The spelling of 1252520317 in words is "one billion, two hundred fifty-two million, five hundred twenty thousand, three hundred seventeen".