126786091 has 2 divisors, whose sum is σ = 126786092. Its totient is φ = 126786090.

The previous prime is 126786089. The next prime is 126786133. The reversal of 126786091 is 190687621.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 126786091 - 2¹ = 126786089 is a prime.

Together with 126786089, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (126786041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63393045 + 63393046.

It is an arithmetic number, because the mean of its divisors is an integer number (63393046).

Almost surely, 2^126786091 is an apocalyptic number.

126786091 is a deficient number, since it is larger than the sum of its proper divisors (1).

126786091 is an equidigital number, since it uses as much as digits as its factorization.

126786091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36288, while the sum is 40.

The square root of 126786091 is about 11259.9329926958. The cubic root of 126786091 is about 502.3702012052.

It can be divided in two parts, 12678 and 6091, that added together give a square (18769 = 137²).

The spelling of 126786091 in words is "one hundred twenty-six million, seven hundred eighty-six thousand, ninety-one".