12122857 has 2 divisors, whose sum is σ = 12122858. Its totient is φ = 12122856.

The previous prime is 12122843. The next prime is 12122867. The reversal of 12122857 is 75822121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11758041 + 364816 = 3429^2 + 604^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12122857 is a prime.

It is not a weakly prime, because it can be changed into another prime (12122807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6061428 + 6061429.

It is an arithmetic number, because the mean of its divisors is an integer number (6061429).

Almost surely, 2^12122857 is an apocalyptic number.

It is an amenable number.

12122857 is a deficient number, since it is larger than the sum of its proper divisors (1).

12122857 is an equidigital number, since it uses as much as digits as its factorization.

12122857 is an odious number, because the sum of its binary digits is odd.

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

The square root of 12122857 is about 3481.7893388314. The cubic root of 12122857 is about 229.7215091819.

Adding to 12122857 its reverse (75822121), we get a palindrome (87944978).

The spelling of 12122857 in words is "twelve million, one hundred twenty-two thousand, eight hundred fifty-seven".