857422 has 8 divisors (see below), whose sum is σ = 1290096. Its totient is φ = 427392.

The previous prime is 857419. The next prime is 857431. The reversal of 857422 is 224758.

857422 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 783 + ... + 1525.

It is an arithmetic number, because the mean of its divisors is an integer number (161262).

2⁸⁵⁷⁴²² is an apocalyptic number.

857422 is a deficient number, since it is larger than the sum of its proper divisors (432674).

857422 is a wasteful number, since it uses less digits than its factorization.

857422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1322.

The product of its digits is 4480, while the sum is 28.

The square root of 857422 is about 925.9708418735. The cubic root of 857422 is about 95.0017358870.

The spelling of 857422 in words is "eight hundred fifty-seven thousand, four hundred twenty-two".