126138611 has 2 divisors, whose sum is σ = 126138612. Its totient is φ = 126138610.

The previous prime is 126138581. The next prime is 126138619. The reversal of 126138611 is 116831621.

It is a strong prime.

It is an emirp because it is prime and its reverse (116831621) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-126138611 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (126138619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63069305 + 63069306.

It is an arithmetic number, because the mean of its divisors is an integer number (63069306).

Almost surely, 2^126138611 is an apocalyptic number.

126138611 is a deficient number, since it is larger than the sum of its proper divisors (1).

126138611 is an equidigital number, since it uses as much as digits as its factorization.

126138611 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1728, while the sum is 29.

The square root of 126138611 is about 11231.1446878758. The cubic root of 126138611 is about 501.5135616392.

The spelling of 126138611 in words is "one hundred twenty-six million, one hundred thirty-eight thousand, six hundred eleven".