126767257 has 2 divisors, whose sum is σ = 126767258. Its totient is φ = 126767256.

The previous prime is 126767227. The next prime is 126767281. The reversal of 126767257 is 752767621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 78659161 + 48108096 = 8869^2 + 6936^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-126767257 is a prime.

It is not a weakly prime, because it can be changed into another prime (126767227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63383628 + 63383629.

It is an arithmetic number, because the mean of its divisors is an integer number (63383629).

Almost surely, 2^126767257 is an apocalyptic number.

It is an amenable number.

126767257 is a deficient number, since it is larger than the sum of its proper divisors (1).

126767257 is an equidigital number, since it uses as much as digits as its factorization.

126767257 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 246960, while the sum is 43.

The square root of 126767257 is about 11259.0966333894. The cubic root of 126767257 is about 502.3453243731.

The spelling of 126767257 in words is "one hundred twenty-six million, seven hundred sixty-seven thousand, two hundred fifty-seven".