13617872 has 10 divisors (see below), whose sum is σ = 26384658. Its totient is φ = 6808928.

The previous prime is 13617859. The next prime is 13617881. The reversal of 13617872 is 27871631.

It can be written as a sum of positive squares in only one way, i.e., 11669056 + 1948816 = 3416^2 + 1396^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 425543 + ... + 425574.

Almost surely, 2^13617872 is an apocalyptic number.

It is an amenable number.

13617872 is a deficient number, since it is larger than the sum of its proper divisors (12766786).

13617872 is an equidigital number, since it uses as much as digits as its factorization.

13617872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 851125 (or 851119 counting only the distinct ones).

The product of its digits is 14112, while the sum is 35.

The square root of 13617872 is about 3690.2401005897. The cubic root of 13617872 is about 238.8011511064.

The spelling of 13617872 in words is "thirteen million, six hundred seventeen thousand, eight hundred seventy-two".