126507517 has 2 divisors, whose sum is σ = 126507518. Its totient is φ = 126507516.

The previous prime is 126507499. The next prime is 126507527. The reversal of 126507517 is 715705621.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 116337796 + 10169721 = 10786^2 + 3189^2 .

It is an emirp because it is prime and its reverse (715705621) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 126507517 - 2⁷ = 126507389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (126507527) 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, 63253758 + 63253759.

It is an arithmetic number, because the mean of its divisors is an integer number (63253759).

Almost surely, 2^126507517 is an apocalyptic number.

It is an amenable number.

126507517 is a deficient number, since it is larger than the sum of its proper divisors (1).

126507517 is an equidigital number, since it uses as much as digits as its factorization.

126507517 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14700, while the sum is 34.

The square root of 126507517 is about 11247.5560456483. The cubic root of 126507517 is about 502.0019959921.

The spelling of 126507517 in words is "one hundred twenty-six million, five hundred seven thousand, five hundred seventeen".