126211643 has 2 divisors, whose sum is σ = 126211644. Its totient is φ = 126211642.

The previous prime is 126211627. The next prime is 126211663. The reversal of 126211643 is 346112621.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 126211643 - 2⁴ = 126211627 is a prime.

It is not a weakly prime, because it can be changed into another prime (126211663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63105821 + 63105822.

It is an arithmetic number, because the mean of its divisors is an integer number (63105822).

Almost surely, 2^126211643 is an apocalyptic number.

126211643 is a deficient number, since it is larger than the sum of its proper divisors (1).

126211643 is an equidigital number, since it uses as much as digits as its factorization.

126211643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1728, while the sum is 26.

The square root of 126211643 is about 11234.3955333609. The cubic root of 126211643 is about 501.6103320933.

The spelling of 126211643 in words is "one hundred twenty-six million, two hundred eleven thousand, six hundred forty-three".