126791217 has 16 divisors (see below), whose sum is σ = 214673280. Its totient is φ = 72452016.

The previous prime is 126791201. The next prime is 126791221. The reversal of 126791217 is 712197621.

It is a happy number.

It is not a de Polignac number, because 126791217 - 2⁴ = 126791201 is a prime.

It is not an unprimeable number, because it can be changed into a prime (126791297) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 335238 + ... + 335615.

It is an arithmetic number, because the mean of its divisors is an integer number (13417080).

Almost surely, 2^126791217 is an apocalyptic number.

It is an amenable number.

126791217 is a deficient number, since it is larger than the sum of its proper divisors (87882063).

126791217 is an equidigital number, since it uses as much as digits as its factorization.

126791217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 670869 (or 670863 counting only the distinct ones).

The product of its digits is 10584, while the sum is 36.

The square root of 126791217 is about 11260.1606116432. The cubic root of 126791217 is about 502.3769714404.

The spelling of 126791217 in words is "one hundred twenty-six million, seven hundred ninety-one thousand, two hundred seventeen".