126846781 has 2 divisors, whose sum is σ = 126846782. Its totient is φ = 126846780.

The previous prime is 126846703. The next prime is 126846787. The reversal of 126846781 is 187648621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 101505625 + 25341156 = 10075^2 + 5034^2 .

It is a cyclic number.

It is not a de Polignac number, because 126846781 - 2⁷ = 126846653 is a prime.

It is a super-2 number, since 2×126846781² = 32180211700123922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (126846787) 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, 63423390 + 63423391.

It is an arithmetic number, because the mean of its divisors is an integer number (63423391).

Almost surely, 2^126846781 is an apocalyptic number.

It is an amenable number.

126846781 is a deficient number, since it is larger than the sum of its proper divisors (1).

126846781 is an equidigital number, since it uses as much as digits as its factorization.

126846781 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 129024, while the sum is 43.

The square root of 126846781 is about 11262.6276241382. The cubic root of 126846781 is about 502.4503466527.

The spelling of 126846781 in words is "one hundred twenty-six million, eight hundred forty-six thousand, seven hundred eighty-one".