422845 has 8 divisors (see below), whose sum is σ = 534240. Its totient is φ = 320400.

The previous prime is 422827. The next prime is 422857. The reversal of 422845 is 548224.

It is a happy number.

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

It is not a de Polignac number, because 422845 - 2¹³ = 414653 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2131 + ... + 2320.

It is an arithmetic number, because the mean of its divisors is an integer number (66780).

2⁴²²⁸⁴⁵ is an apocalyptic number.

It is an amenable number.

422845 is a deficient number, since it is larger than the sum of its proper divisors (111395).

422845 is a wasteful number, since it uses less digits than its factorization.

422845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4475.

The product of its digits is 2560, while the sum is 25.

The square root of 422845 is about 650.2653304613. The cubic root of 422845 is about 75.0574374827.

It can be divided in two parts, 422 and 845, that multiplied together give a triangular number (356590 = T₈₄₄).

The spelling of 422845 in words is "four hundred twenty-two thousand, eight hundred forty-five".