851422 has 24 divisors (see below), whose sum is σ = 1515240. Its totient is φ = 355680.

The previous prime is 851419. The next prime is 851423. The reversal of 851422 is 224158.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 851393 and 851402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (851423) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3604 + ... + 3832.

It is an arithmetic number, because the mean of its divisors is an integer number (63135).

2⁸⁵¹⁴²² is an apocalyptic number.

851422 is a deficient number, since it is larger than the sum of its proper divisors (663818).

851422 is a wasteful number, since it uses less digits than its factorization.

851422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 268 (or 255 counting only the distinct ones).

The product of its digits is 640, while the sum is 22.

The square root of 851422 is about 922.7253112384. The cubic root of 851422 is about 94.7796184234.

Subtracting from 851422 its reverse (224158), we obtain a square (627264 = 792²).

The spelling of 851422 in words is "eight hundred fifty-one thousand, four hundred twenty-two".