12285217 has 8 divisors (see below), whose sum is σ = 14270912. Its totient is φ = 10357200.

The previous prime is 12285193. The next prime is 12285239. The reversal of 12285217 is 71258221.

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

It is not a de Polignac number, because 12285217 - 2¹¹ = 12283169 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (12285257) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 13959 + ... + 14812.

It is an arithmetic number, because the mean of its divisors is an integer number (1783864).

Almost surely, 2^12285217 is an apocalyptic number.

It is an amenable number.

12285217 is a deficient number, since it is larger than the sum of its proper divisors (1985695).

12285217 is an equidigital number, since it uses as much as digits as its factorization.

12285217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28839.

The product of its digits is 2240, while the sum is 28.

The square root of 12285217 is about 3505.0273893366. The cubic root of 12285217 is about 230.7425090113.

It can be divided in two parts, 1228521 and 7, that added together give a triangular number (1228528 = T₁₅₆₇).

The spelling of 12285217 in words is "twelve million, two hundred eighty-five thousand, two hundred seventeen".