12222857 has 2 divisors, whose sum is σ = 12222858. Its totient is φ = 12222856.

The previous prime is 12222851. The next prime is 12222869. The reversal of 12222857 is 75822221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12222016 + 841 = 3496^2 + 29^2 .

It is a cyclic number.

It is not a de Polignac number, because 12222857 - 2⁴ = 12222841 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (12222851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6111428 + 6111429.

It is an arithmetic number, because the mean of its divisors is an integer number (6111429).

Almost surely, 2^12222857 is an apocalyptic number.

It is an amenable number.

12222857 is a deficient number, since it is larger than the sum of its proper divisors (1).

12222857 is an equidigital number, since it uses as much as digits as its factorization.

12222857 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4480, while the sum is 29.

The square root of 12222857 is about 3496.1202782513. The cubic root of 12222857 is about 230.3514287342.

The spelling of 12222857 in words is "twelve million, two hundred twenty-two thousand, eight hundred fifty-seven".