126403817 has 2 divisors, whose sum is σ = 126403818. Its totient is φ = 126403816.

The previous prime is 126403811. The next prime is 126403829. The reversal of 126403817 is 718304621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 65626201 + 60777616 = 8101^2 + 7796^2 .

It is a cyclic number.

It is not a de Polignac number, because 126403817 - 2⁴ = 126403801 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (126403811) 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, 63201908 + 63201909.

It is an arithmetic number, because the mean of its divisors is an integer number (63201909).

Almost surely, 2^126403817 is an apocalyptic number.

It is an amenable number.

126403817 is a deficient number, since it is larger than the sum of its proper divisors (1).

126403817 is an equidigital number, since it uses as much as digits as its factorization.

126403817 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 126403817 is about 11242.9452102196. The cubic root of 126403817 is about 501.8647924519.

The spelling of 126403817 in words is "one hundred twenty-six million, four hundred three thousand, eight hundred seventeen".