857426 has 8 divisors (see below), whose sum is σ = 1300860. Its totient is φ = 423808.

The previous prime is 857419. The next prime is 857431. The reversal of 857426 is 624758.

It can be written as a sum of positive squares in 2 ways, for example, as 724201 + 133225 = 851^2 + 365^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 857392 and 857401.

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, 2231 + ... + 2586.

2⁸⁵⁷⁴²⁶ is an apocalyptic number.

857426 is a deficient number, since it is larger than the sum of its proper divisors (443434).

857426 is a wasteful number, since it uses less digits than its factorization.

857426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4908.

The product of its digits is 13440, while the sum is 32.

The square root of 857426 is about 925.9730017663. The cubic root of 857426 is about 95.0018836192.

The spelling of 857426 in words is "eight hundred fifty-seven thousand, four hundred twenty-six".