126542873 has 2 divisors, whose sum is σ = 126542874. Its totient is φ = 126542872.

The previous prime is 126542839. The next prime is 126542929. The reversal of 126542873 is 378245621.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 90878089 + 35664784 = 9533^2 + 5972^2 .

It is a cyclic number.

It is not a de Polignac number, because 126542873 - 2⁸ = 126542617 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is equal to p_7192937 and since 126542873 and 7192937 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (126542473) 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, 63271436 + 63271437.

It is an arithmetic number, because the mean of its divisors is an integer number (63271437).

Almost surely, 2^126542873 is an apocalyptic number.

It is an amenable number.

126542873 is a deficient number, since it is larger than the sum of its proper divisors (1).

126542873 is an equidigital number, since it uses as much as digits as its factorization.

126542873 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 80640, while the sum is 38.

The square root of 126542873 is about 11249.1276550673. The cubic root of 126542873 is about 502.0487577177.

The spelling of 126542873 in words is "one hundred twenty-six million, five hundred forty-two thousand, eight hundred seventy-three".