126681199 has 2 divisors, whose sum is σ = 126681200. Its totient is φ = 126681198.

The previous prime is 126681179. The next prime is 126681223. The reversal of 126681199 is 991186621.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 126681199 - 2⁵ = 126681167 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (126681179) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63340599 + 63340600.

It is an arithmetic number, because the mean of its divisors is an integer number (63340600).

Almost surely, 2^126681199 is an apocalyptic number.

126681199 is a deficient number, since it is larger than the sum of its proper divisors (1).

126681199 is an equidigital number, since it uses as much as digits as its factorization.

126681199 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 46656, while the sum is 43.

The square root of 126681199 is about 11255.2742747567. The cubic root of 126681199 is about 502.2316235608.

The spelling of 126681199 in words is "one hundred twenty-six million, six hundred eighty-one thousand, one hundred ninety-nine".