126450661 has 2 divisors, whose sum is σ = 126450662. Its totient is φ = 126450660.

The previous prime is 126450637. The next prime is 126450671. The reversal of 126450661 is 166054621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 84070561 + 42380100 = 9169^2 + 6510^2 .

It is an emirp because it is prime and its reverse (166054621) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-126450661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (126450631) 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, 63225330 + 63225331.

It is an arithmetic number, because the mean of its divisors is an integer number (63225331).

Almost surely, 2^126450661 is an apocalyptic number.

It is an amenable number.

126450661 is a deficient number, since it is larger than the sum of its proper divisors (1).

126450661 is an equidigital number, since it uses as much as digits as its factorization.

126450661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 126450661 is about 11245.0282791997. The cubic root of 126450661 is about 501.9267801655.

The spelling of 126450661 in words is "one hundred twenty-six million, four hundred fifty thousand, six hundred sixty-one".