126156091 has 2 divisors, whose sum is σ = 126156092. Its totient is φ = 126156090.

The previous prime is 126156077. The next prime is 126156193. The reversal of 126156091 is 190651621.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 126156091 - 2¹¹ = 126154043 is a prime.

It is not a weakly prime, because it can be changed into another prime (126156991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63078045 + 63078046.

It is an arithmetic number, because the mean of its divisors is an integer number (63078046).

Almost surely, 2^126156091 is an apocalyptic number.

126156091 is a deficient number, since it is larger than the sum of its proper divisors (1).

126156091 is an equidigital number, since it uses as much as digits as its factorization.

126156091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3240, while the sum is 31.

The square root of 126156091 is about 11231.9228540798. The cubic root of 126156091 is about 501.5367267696.

The spelling of 126156091 in words is "one hundred twenty-six million, one hundred fifty-six thousand, ninety-one".