126251317 has 2 divisors, whose sum is σ = 126251318. Its totient is φ = 126251316.

The previous prime is 126251287. The next prime is 126251329. The reversal of 126251317 is 713152621.

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., 100180081 + 26071236 = 10009^2 + 5106^2 .

It is a cyclic number.

It is not a de Polignac number, because 126251317 - 2¹¹ = 126249269 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (126251357) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63125658 + 63125659.

It is an arithmetic number, because the mean of its divisors is an integer number (63125659).

Almost surely, 2^126251317 is an apocalyptic number.

It is an amenable number.

126251317 is a deficient number, since it is larger than the sum of its proper divisors (1).

126251317 is an equidigital number, since it uses as much as digits as its factorization.

126251317 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2520, while the sum is 28.

The square root of 126251317 is about 11236.1611327001. The cubic root of 126251317 is about 501.6628861550.

The spelling of 126251317 in words is "one hundred twenty-six million, two hundred fifty-one thousand, three hundred seventeen".