126011243 has 2 divisors, whose sum is σ = 126011244. Its totient is φ = 126011242.

The previous prime is 126011231. The next prime is 126011257. The reversal of 126011243 is 342110621.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 126011243 - 2¹⁰ = 126010219 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (126013243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63005621 + 63005622.

It is an arithmetic number, because the mean of its divisors is an integer number (63005622).

Almost surely, 2^126011243 is an apocalyptic number.

126011243 is a deficient number, since it is larger than the sum of its proper divisors (1).

126011243 is an equidigital number, since it uses as much as digits as its factorization.

126011243 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 126011243 is about 11225.4729521744. The cubic root of 126011243 is about 501.3447042987.

Adding to 126011243 its reverse (342110621), we get a palindrome (468121864).

The spelling of 126011243 in words is "one hundred twenty-six million, eleven thousand, two hundred forty-three".