126945009 has 16 divisors (see below), whose sum is σ = 189552640. Its totient is φ = 83961360.

The previous prime is 126944959. The next prime is 126945037. The reversal of 126945009 is 900549621.

It is not a de Polignac number, because 126945009 - 2²³ = 118556401 is a prime.

It is a super-2 number, since 2×126945009² = 32230070620020162, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (126945079) 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 in 15 ways as a sum of consecutive naturals, for example, 15082 + ... + 21939.

It is an arithmetic number, because the mean of its divisors is an integer number (11847040).

Almost surely, 2^126945009 is an apocalyptic number.

It is an amenable number.

126945009 is a deficient number, since it is larger than the sum of its proper divisors (62607631).

126945009 is a wasteful number, since it uses less digits than its factorization.

126945009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37157 (or 37151 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 36.

The square root of 126945009 is about 11266.9875743253. The cubic root of 126945009 is about 502.5800095366.

The spelling of 126945009 in words is "one hundred twenty-six million, nine hundred forty-five thousand, nine".