126117809 has 8 divisors (see below), whose sum is σ = 131740992. Its totient is φ = 120506320.

The previous prime is 126117787. The next prime is 126117811. The reversal of 126117809 is 908711621.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 126117809 - 2¹⁶ = 126052273 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (126113809) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24842 + ... + 29484.

It is an arithmetic number, because the mean of its divisors is an integer number (16467624).

Almost surely, 2^126117809 is an apocalyptic number.

It is an amenable number.

126117809 is a deficient number, since it is larger than the sum of its proper divisors (5623183).

126117809 is a wasteful number, since it uses less digits than its factorization.

126117809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5847.

The product of its (nonzero) digits is 6048, while the sum is 35.

The square root of 126117809 is about 11230.2185642133. The cubic root of 126117809 is about 501.4859912847.

The spelling of 126117809 in words is "one hundred twenty-six million, one hundred seventeen thousand, eight hundred nine".