126666641 has 2 divisors, whose sum is σ = 126666642. Its totient is φ = 126666640.

The previous prime is 126666623. The next prime is 126666667. The reversal of 126666641 is 146666621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 119268241 + 7398400 = 10921^2 + 2720^2 .

It is an emirp because it is prime and its reverse (146666621) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-126666641 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 126666595 and 126666604.

It is not a weakly prime, because it can be changed into another prime (126666601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63333320 + 63333321.

It is an arithmetic number, because the mean of its divisors is an integer number (63333321).

Almost surely, 2^126666641 is an apocalyptic number.

It is an amenable number.

126666641 is a deficient number, since it is larger than the sum of its proper divisors (1).

126666641 is an equidigital number, since it uses as much as digits as its factorization.

126666641 is an evil number, because the sum of its binary digits is even.

The product of its digits is 62208, while the sum is 38.

The square root of 126666641 is about 11254.6275371511. The cubic root of 126666641 is about 502.2123842732.

The spelling of 126666641 in words is "one hundred twenty-six million, six hundred sixty-six thousand, six hundred forty-one".