126411991 has 2 divisors, whose sum is σ = 126411992. Its totient is φ = 126411990.

The previous prime is 126411973. The next prime is 126412001. The reversal of 126411991 is 199114621.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 126411991 - 2⁹ = 126411479 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (126411091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63205995 + 63205996.

It is an arithmetic number, because the mean of its divisors is an integer number (63205996).

Almost surely, 2^126411991 is an apocalyptic number.

126411991 is a deficient number, since it is larger than the sum of its proper divisors (1).

126411991 is an equidigital number, since it uses as much as digits as its factorization.

126411991 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3888, while the sum is 34.

The square root of 126411991 is about 11243.3087211906. The cubic root of 126411991 is about 501.8756100430.

The spelling of 126411991 in words is "one hundred twenty-six million, four hundred eleven thousand, nine hundred ninety-one".