12739217 has 8 divisors (see below), whose sum is σ = 13329024. Its totient is φ = 12152448.

The previous prime is 12739189. The next prime is 12739229. The reversal of 12739217 is 71293721.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12739217 - 2¹⁶ = 12673681 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12739247) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15068 + ... + 15890.

It is an arithmetic number, because the mean of its divisors is an integer number (1666128).

Almost surely, 2^12739217 is an apocalyptic number.

It is an amenable number.

12739217 is a deficient number, since it is larger than the sum of its proper divisors (589807).

12739217 is an equidigital number, since it uses as much as digits as its factorization.

12739217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1519.

The product of its digits is 5292, while the sum is 32.

The square root of 12739217 is about 3569.2039728769. The cubic root of 12739217 is about 233.5505593846.

The spelling of 12739217 in words is "twelve million, seven hundred thirty-nine thousand, two hundred seventeen".