12205285 has 4 divisors (see below), whose sum is σ = 14646348. Its totient is φ = 9764224.

The previous prime is 12205283. The next prime is 12205309. The reversal of 12205285 is 58250221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 58250221 = 1747 ⋅33343.

It can be written as a sum of positive squares in 2 ways, for example, as 8116801 + 4088484 = 2849^2 + 2022^2 .

It is a cyclic number.

It is not a de Polignac number, because 12205285 - 2¹ = 12205283 is a prime.

It is a Duffinian number.

It is a plaindrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12205283) 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, 1220524 + ... + 1220533.

It is an arithmetic number, because the mean of its divisors is an integer number (3661587).

Almost surely, 2^12205285 is an apocalyptic number.

It is an amenable number.

12205285 is a deficient number, since it is larger than the sum of its proper divisors (2441063).

12205285 is an equidigital number, since it uses as much as digits as its factorization.

12205285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2441062.

The product of its (nonzero) digits is 1600, while the sum is 25.

The square root of 12205285 is about 3493.6063029483. The cubic root of 12205285 is about 230.2409887452.

The spelling of 12205285 in words is "twelve million, two hundred five thousand, two hundred eighty-five".