422857 has 2 divisors, whose sum is σ = 422858. Its totient is φ = 422856.

The previous prime is 422827. The next prime is 422861. The reversal of 422857 is 758224.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 335241 + 87616 = 579^2 + 296^2 .

It is a cyclic number.

It is not a de Polignac number, because 422857 - 2¹¹ = 420809 is a prime.

It is not a weakly prime, because it can be changed into another prime (422827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211428 + 211429.

It is an arithmetic number, because the mean of its divisors is an integer number (211429).

2⁴²²⁸⁵⁷ is an apocalyptic number.

It is an amenable number.

422857 is a deficient number, since it is larger than the sum of its proper divisors (1).

422857 is an equidigital number, since it uses as much as digits as its factorization.

422857 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4480, while the sum is 28.

The square root of 422857 is about 650.2745573986. The cubic root of 422857 is about 75.0581474992.

The spelling of 422857 in words is "four hundred twenty-two thousand, eight hundred fifty-seven".