857224 has 16 divisors (see below), whose sum is σ = 1627920. Its totient is φ = 423120.

The previous prime is 857221. The next prime is 857249. The reversal of 857224 is 422758.

It is a d-powerful number, because it can be written as 8⁵ + 5⁴ + 2⁴ + 7⁷ + 2⁸ + 4² .

It is a junction number, because it is equal to n+sod(n) for n = 857192 and 857201.

It is not an unprimeable number, because it can be changed into a prime (857221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19 + ... + 1309.

It is an arithmetic number, because the mean of its divisors is an integer number (101745).

2⁸⁵⁷²²⁴ is an apocalyptic number.

It is an amenable number.

857224 is a deficient number, since it is larger than the sum of its proper divisors (770696).

857224 is a wasteful number, since it uses less digits than its factorization.

857224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1380 (or 1376 counting only the distinct ones).

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

The square root of 857224 is about 925.8639208869. The cubic root of 857224 is about 94.9944225719.

It can be divided in two parts, 857 and 224, that added together give a triangular number (1081 = T₄₆).

The spelling of 857224 in words is "eight hundred fifty-seven thousand, two hundred twenty-four".