12205849 has 2 divisors, whose sum is σ = 12205850. Its totient is φ = 12205848.

The previous prime is 12205829. The next prime is 12205867. The reversal of 12205849 is 94850221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10497600 + 1708249 = 3240^2 + 1307^2 .

It is an emirp because it is prime and its reverse (94850221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12205849 - 2¹³ = 12197657 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12205849.

It is not a weakly prime, because it can be changed into another prime (12205829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6102924 + 6102925.

It is an arithmetic number, because the mean of its divisors is an integer number (6102925).

Almost surely, 2^12205849 is an apocalyptic number.

It is an amenable number.

12205849 is a deficient number, since it is larger than the sum of its proper divisors (1).

12205849 is an equidigital number, since it uses as much as digits as its factorization.

12205849 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 12205849 is about 3493.6870208993. The cubic root of 12205849 is about 230.2445351301.

The spelling of 12205849 in words is "twelve million, two hundred five thousand, eight hundred forty-nine".