126039791 has 2 divisors, whose sum is σ = 126039792. Its totient is φ = 126039790.

The previous prime is 126039737. The next prime is 126039817. The reversal of 126039791 is 197930621.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 126039791 - 2¹⁸ = 125777647 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (126039721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63019895 + 63019896.

It is an arithmetic number, because the mean of its divisors is an integer number (63019896).

Almost surely, 2^126039791 is an apocalyptic number.

126039791 is a deficient number, since it is larger than the sum of its proper divisors (1).

126039791 is an equidigital number, since it uses as much as digits as its factorization.

126039791 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20412, while the sum is 38.

The square root of 126039791 is about 11226.7444524225. The cubic root of 126039791 is about 501.3825615236.

The spelling of 126039791 in words is "one hundred twenty-six million, thirty-nine thousand, seven hundred ninety-one".