126842791 has 2 divisors, whose sum is σ = 126842792. Its totient is φ = 126842790.

The previous prime is 126842789. The next prime is 126842827. The reversal of 126842791 is 197248621.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 126842791 - 2¹ = 126842789 is a prime.

Together with 126842789, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (126842741) 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, 63421395 + 63421396.

It is an arithmetic number, because the mean of its divisors is an integer number (63421396).

Almost surely, 2^126842791 is an apocalyptic number.

126842791 is a deficient number, since it is larger than the sum of its proper divisors (1).

126842791 is an equidigital number, since it uses as much as digits as its factorization.

126842791 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48384, while the sum is 40.

The square root of 126842791 is about 11262.4504882375. The cubic root of 126842791 is about 502.4450783601.

The spelling of 126842791 in words is "one hundred twenty-six million, eight hundred forty-two thousand, seven hundred ninety-one".