126000661 has 2 divisors, whose sum is σ = 126000662. Its totient is φ = 126000660.

The previous prime is 126000653. The next prime is 126000671. The reversal of 126000661 is 166000621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 126000625 + 36 = 11225^2 + 6^2 .

It is an emirp because it is prime and its reverse (166000621) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 126000661 - 2³ = 126000653 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (126000671) 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, 63000330 + 63000331.

It is an arithmetic number, because the mean of its divisors is an integer number (63000331).

Almost surely, 2^126000661 is an apocalyptic number.

It is an amenable number.

126000661 is a deficient number, since it is larger than the sum of its proper divisors (1).

126000661 is an equidigital number, since it uses as much as digits as its factorization.

126000661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 126000661 is about 11225.0016035634. The cubic root of 126000661 is about 501.3306701589.

The spelling of 126000661 in words is "one hundred twenty-six million, six hundred sixty-one", and thus it is an aban number.