126907809 has 16 divisors (see below), whose sum is σ = 194546688. Its totient is φ = 72082512.

The previous prime is 126907793. The next prime is 126907819. The reversal of 126907809 is 908709621.

It is not a de Polignac number, because 126907809 - 2⁴ = 126907793 is a prime.

It is a super-2 number, since 2×126907809² = 32211183970360962, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (126907819) 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, 14587 + ... + 21600.

It is an arithmetic number, because the mean of its divisors is an integer number (12159168).

Almost surely, 2^126907809 is an apocalyptic number.

It is an amenable number.

126907809 is a deficient number, since it is larger than the sum of its proper divisors (67638879).

126907809 is a wasteful number, since it uses less digits than its factorization.

126907809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36364.

The product of its (nonzero) digits is 54432, while the sum is 42.

The square root of 126907809 is about 11265.3366128137. The cubic root of 126907809 is about 502.5309126796.

The spelling of 126907809 in words is "one hundred twenty-six million, nine hundred seven thousand, eight hundred nine".