13217872 has 20 divisors (see below), whose sum is σ = 25690816. Its totient is φ = 6588000.

The previous prime is 13217861. The next prime is 13217903. The reversal of 13217872 is 27871231.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4747 + ... + 6997.

Almost surely, 2^13217872 is an apocalyptic number.

It is an amenable number.

13217872 is a deficient number, since it is larger than the sum of its proper divisors (12472944).

13217872 is a wasteful number, since it uses less digits than its factorization.

13217872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2626 (or 2620 counting only the distinct ones).

The product of its digits is 4704, while the sum is 31.

The square root of 13217872 is about 3635.6391460100. The cubic root of 13217872 is about 236.4397622465.

The spelling of 13217872 in words is "thirteen million, two hundred seventeen thousand, eight hundred seventy-two".