126724757 has 2 divisors, whose sum is σ = 126724758. Its totient is φ = 126724756.

The previous prime is 126724753. The next prime is 126724799. The reversal of 126724757 is 757427621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 110796676 + 15928081 = 10526^2 + 3991^2 .

It is an emirp because it is prime and its reverse (757427621) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 126724757 - 2² = 126724753 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 (126724753) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63362378 + 63362379.

It is an arithmetic number, because the mean of its divisors is an integer number (63362379).

Almost surely, 2^126724757 is an apocalyptic number.

It is an amenable number.

126724757 is a deficient number, since it is larger than the sum of its proper divisors (1).

126724757 is an equidigital number, since it uses as much as digits as its factorization.

126724757 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 164640, while the sum is 41.

The square root of 126724757 is about 11257.2091123866. The cubic root of 126724757 is about 502.2891793213.

The spelling of 126724757 in words is "one hundred twenty-six million, seven hundred twenty-four thousand, seven hundred fifty-seven".