12917538 has 24 divisors (see below), whose sum is σ = 28080000. Its totient is φ = 4291704.

The previous prime is 12917507. The next prime is 12917563. The reversal of 12917538 is 83571921.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5463 + ... + 7461.

It is an arithmetic number, because the mean of its divisors is an integer number (1170000).

Almost surely, 2^12917538 is an apocalyptic number.

12917538 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

12917538 is an abundant number, since it is smaller than the sum of its proper divisors (15162462).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12917538 is a wasteful number, since it uses less digits than its factorization.

12917538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2366 (or 2363 counting only the distinct ones).

The product of its digits is 15120, while the sum is 36.

The square root of 12917538 is about 3594.0976614444. The cubic root of 12917538 is about 234.6352452154.

The spelling of 12917538 in words is "twelve million, nine hundred seventeen thousand, five hundred thirty-eight".