12985617 has 4 divisors (see below), whose sum is σ = 17314160. Its totient is φ = 8657076.

The previous prime is 12985601. The next prime is 12985633. The reversal of 12985617 is 71658921.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 71658921 = 3 ⋅23886307.

It is an interprime number because it is at equal distance from previous prime (12985601) and next prime (12985633).

It is not a de Polignac number, because 12985617 - 2⁴ = 12985601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12985657) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2164267 + ... + 2164272.

It is an arithmetic number, because the mean of its divisors is an integer number (4328540).

Almost surely, 2^12985617 is an apocalyptic number.

It is an amenable number.

12985617 is a deficient number, since it is larger than the sum of its proper divisors (4328543).

12985617 is an equidigital number, since it uses as much as digits as its factorization.

12985617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4328542.

The product of its digits is 30240, while the sum is 39.

The square root of 12985617 is about 3603.5561602395. The cubic root of 12985617 is about 235.0467207545.

The spelling of 12985617 in words is "twelve million, nine hundred eighty-five thousand, six hundred seventeen".