12205757 has 2 divisors, whose sum is σ = 12205758. Its totient is φ = 12205756.

The previous prime is 12205751. The next prime is 12205777. The reversal of 12205757 is 75750221.

12205757 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8561476 + 3644281 = 2926^2 + 1909^2 .

It is an emirp because it is prime and its reverse (75750221) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12205757 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12205751) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6102878 + 6102879.

It is an arithmetic number, because the mean of its divisors is an integer number (6102879).

Almost surely, 2^12205757 is an apocalyptic number.

It is an amenable number.

12205757 is a deficient number, since it is larger than the sum of its proper divisors (1).

12205757 is an equidigital number, since it uses as much as digits as its factorization.

12205757 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4900, while the sum is 29.

The square root of 12205757 is about 3493.6738542686. The cubic root of 12205757 is about 230.2439566493.

Adding to 12205757 its reverse (75750221), we get a palindrome (87955978).

The spelling of 12205757 in words is "twelve million, two hundred five thousand, seven hundred fifty-seven".