845422 has 4 divisors (see below), whose sum is σ = 1268136. Its totient is φ = 422710.

The previous prime is 845387. The next prime is 845431. The reversal of 845422 is 224548.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

845422 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211354 + ... + 211357.

It is an arithmetic number, because the mean of its divisors is an integer number (317034).

2⁸⁴⁵⁴²² is an apocalyptic number.

845422 is a deficient number, since it is larger than the sum of its proper divisors (422714).

845422 is a wasteful number, since it uses less digits than its factorization.

845422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 422713.

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

The square root of 845422 is about 919.4683246311. The cubic root of 845422 is about 94.5564549801.

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

The spelling of 845422 in words is "eight hundred forty-five thousand, four hundred twenty-two".