12917288 has 8 divisors (see below), whose sum is σ = 24219930. Its totient is φ = 6458640.

The previous prime is 12917273. The next prime is 12917291. The reversal of 12917288 is 88271921.

It can be written as a sum of positive squares in only one way, i.e., 9597604 + 3319684 = 3098^2 + 1822^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 807323 + ... + 807338.

Almost surely, 2^12917288 is an apocalyptic number.

It is an amenable number.

12917288 is a deficient number, since it is larger than the sum of its proper divisors (11302642).

12917288 is a wasteful number, since it uses less digits than its factorization.

12917288 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1614667 (or 1614663 counting only the distinct ones).

The product of its digits is 16128, while the sum is 38.

The square root of 12917288 is about 3594.0628820320. The cubic root of 12917288 is about 234.6337315320.

The spelling of 12917288 in words is "twelve million, nine hundred seventeen thousand, two hundred eighty-eight".