126009943 has 2 divisors, whose sum is σ = 126009944. Its totient is φ = 126009942.

The previous prime is 126009911. The next prime is 126009971. The reversal of 126009943 is 349900621.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 126009943 - 2⁵ = 126009911 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 126009899 and 126009908.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (126009973) 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, 63004971 + 63004972.

It is an arithmetic number, because the mean of its divisors is an integer number (63004972).

Almost surely, 2^126009943 is an apocalyptic number.

126009943 is a deficient number, since it is larger than the sum of its proper divisors (1).

126009943 is an equidigital number, since it uses as much as digits as its factorization.

126009943 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11664, while the sum is 34.

The square root of 126009943 is about 11225.4150480060. The cubic root of 126009943 is about 501.3429802452.

The spelling of 126009943 in words is "one hundred twenty-six million, nine thousand, nine hundred forty-three".