12872217 has 8 divisors (see below), whose sum is σ = 17192224. Its totient is φ = 8566848.

The previous prime is 12872183. The next prime is 12872227. The reversal of 12872217 is 71227821.

It is a happy number.

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

It is not a de Polignac number, because 12872217 - 2¹⁴ = 12855833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12872227) 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, 1408 + ... + 5265.

It is an arithmetic number, because the mean of its divisors is an integer number (2149028).

Almost surely, 2^12872217 is an apocalyptic number.

It is an amenable number.

12872217 is a deficient number, since it is larger than the sum of its proper divisors (4320007).

12872217 is an equidigital number, since it uses as much as digits as its factorization.

12872217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7319.

The product of its digits is 3136, while the sum is 30.

The square root of 12872217 is about 3587.7872010475. The cubic root of 12872217 is about 234.3605188564.

The spelling of 12872217 in words is "twelve million, eight hundred seventy-two thousand, two hundred seventeen".