422643 has 8 divisors (see below), whose sum is σ = 606928. Its totient is φ = 260064.

The previous prime is 422627. The next prime is 422657. The reversal of 422643 is 346224.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 422643 - 2⁴ = 422627 is a prime.

It is a d-powerful number, because it can be written as 4⁴ + 2¹³ + 6⁴ + 2¹⁷ + 4⁹ + 3⁹ .

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 422643.

It is not an unprimeable number, because it can be changed into a prime (422243) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5380 + ... + 5457.

It is an arithmetic number, because the mean of its divisors is an integer number (75866).

2⁴²²⁶⁴³ is an apocalyptic number.

422643 is a deficient number, since it is larger than the sum of its proper divisors (184285).

422643 is a wasteful number, since it uses less digits than its factorization.

422643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10853.

The product of its digits is 1152, while the sum is 21.

The square root of 422643 is about 650.1099906939. The cubic root of 422643 is about 75.0454835222.

Adding to 422643 its reverse (346224), we get a palindrome (768867).

The spelling of 422643 in words is "four hundred twenty-two thousand, six hundred forty-three".