422657 has 2 divisors, whose sum is σ = 422658. Its totient is φ = 422656.

The previous prime is 422627. The next prime is 422689. The reversal of 422657 is 756224.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 414736 + 7921 = 644^2 + 89^2 .

It is a cyclic number.

It is not a de Polignac number, because 422657 - 2¹⁰ = 421633 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (422627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211328 + 211329.

It is an arithmetic number, because the mean of its divisors is an integer number (211329).

2⁴²²⁶⁵⁷ is an apocalyptic number.

It is an amenable number.

422657 is a deficient number, since it is larger than the sum of its proper divisors (1).

422657 is an equidigital number, since it uses as much as digits as its factorization.

422657 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3360, while the sum is 26.

The square root of 422657 is about 650.1207580135. The cubic root of 422657 is about 75.0463121373.

The spelling of 422657 in words is "four hundred twenty-two thousand, six hundred fifty-seven".