85422 has 16 divisors (see below), whose sum is σ = 178560. Its totient is φ = 27192.

The previous prime is 85411. The next prime is 85427. The reversal of 85422 is 22458.

Added to its reverse (22458) it gives a triangular number (107880 = T₄₆₄).

It is a nialpdrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85427) by changing a digit.

85422 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 in 7 ways as a sum of consecutive naturals, for example, 172 + ... + 447.

It is an arithmetic number, because the mean of its divisors is an integer number (11160).

2⁸⁵⁴²² is an apocalyptic number.

85422 is an abundant number, since it is smaller than the sum of its proper divisors (93138).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89280).

85422 is a wasteful number, since it uses less digits than its factorization.

85422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 647.

The product of its digits is 640, while the sum is 21.

The square root of 85422 is about 292.2704227253. The cubic root of 85422 is about 44.0409398571.

Adding to 85422 its reverse (22458), we get a triangular number (107880 = T₄₆₄).

The spelling of 85422 in words is "eighty-five thousand, four hundred twenty-two".