12777217 has 8 divisors (see below), whose sum is σ = 13759200. Its totient is φ = 11820864.

The previous prime is 12777209. The next prime is 12777221. The reversal of 12777217 is 71277721.

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 12777217 - 2³ = 12777209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12777277) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5367 + ... + 7372.

It is an arithmetic number, because the mean of its divisors is an integer number (1719900).

Almost surely, 2^12777217 is an apocalyptic number.

12777217 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

12777217 is a deficient number, since it is larger than the sum of its proper divisors (981983).

12777217 is a wasteful number, since it uses less digits than its factorization.

12777217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12815.

The product of its digits is 9604, while the sum is 34.

The square root of 12777217 is about 3574.5233248644. The cubic root of 12777217 is about 233.7825493484.

The spelling of 12777217 in words is "twelve million, seven hundred seventy-seven thousand, two hundred seventeen".