126805189 has 6 divisors (see below), whose sum is σ = 147508134. Its totient is φ = 108690120.

The previous prime is 126805181. The next prime is 126805199. The reversal of 126805189 is 981508621.

It can be written as a sum of positive squares in only one way, i.e., 109516225 + 17288964 = 10465^2 + 4158^2 .

It is not a de Polignac number, because 126805189 - 2³ = 126805181 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126805181) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1293882 + ... + 1293979.

It is an arithmetic number, because the mean of its divisors is an integer number (24584689).

Almost surely, 2^126805189 is an apocalyptic number.

It is an amenable number.

126805189 is a deficient number, since it is larger than the sum of its proper divisors (20702945).

126805189 is an equidigital number, since it uses as much as digits as its factorization.

126805189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2587875 (or 2587868 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 40.

The square root of 126805189 is about 11260.7810119902. The cubic root of 126805189 is about 502.3954242255.

The spelling of 126805189 in words is "one hundred twenty-six million, eight hundred five thousand, one hundred eighty-nine".