12204845 has 4 divisors (see below), whose sum is σ = 14645820. Its totient is φ = 9763872.

The previous prime is 12204833. The next prime is 12204847. The reversal of 12204845 is 54840221.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54840221 = 199 ⋅275579.

It can be written as a sum of positive squares in 2 ways, for example, as 6568969 + 5635876 = 2563^2 + 2374^2 .

It is a cyclic number.

It is not a de Polignac number, because 12204845 - 2⁶ = 12204781 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12204847) 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, 1220480 + ... + 1220489.

It is an arithmetic number, because the mean of its divisors is an integer number (3661455).

Almost surely, 2^12204845 is an apocalyptic number.

It is an amenable number.

12204845 is a deficient number, since it is larger than the sum of its proper divisors (2440975).

12204845 is an equidigital number, since it uses as much as digits as its factorization.

12204845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2440974.

The product of its (nonzero) digits is 2560, while the sum is 26.

The square root of 12204845 is about 3493.5433302022. The cubic root of 12204845 is about 230.2382219860.

The spelling of 12204845 in words is "twelve million, two hundred four thousand, eight hundred forty-five".