126403035257 has 2 divisors, whose sum is σ = 126403035258. Its totient is φ = 126403035256.

The previous prime is 126403035233. The next prime is 126403035263. The reversal of 126403035257 is 752530304621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 125871686656 + 531348601 = 354784^2 + 23051^2 .

It is a cyclic number.

It is not a de Polignac number, because 126403035257 - 2⁶ = 126403035193 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 126403035257.

It is not a weakly prime, because it can be changed into another prime (126403035457) 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, 63201517628 + 63201517629.

It is an arithmetic number, because the mean of its divisors is an integer number (63201517629).

Almost surely, 2^126403035257 is an apocalyptic number.

It is an amenable number.

126403035257 is a deficient number, since it is larger than the sum of its proper divisors (1).

126403035257 is an equidigital number, since it uses as much as digits as its factorization.

126403035257 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 151200, while the sum is 38.

Adding to 126403035257 its reverse (752530304621), we get a palindrome (878933339878).

The spelling of 126403035257 in words is "one hundred twenty-six billion, four hundred three million, thirty-five thousand, two hundred fifty-seven".