857473 has 4 divisors (see below), whose sum is σ = 867888. Its totient is φ = 847060.

The previous prime is 857471. The next prime is 857513. The reversal of 857473 is 374758.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 374758 = 2 ⋅187379.

It is a cyclic number.

It is not a de Polignac number, because 857473 - 2¹ = 857471 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (857471) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5083 + ... + 5248.

It is an arithmetic number, because the mean of its divisors is an integer number (216972).

2⁸⁵⁷⁴⁷³ is an apocalyptic number.

857473 is a gapful number since it is divisible by the number (83) formed by its first and last digit.

It is an amenable number.

857473 is a deficient number, since it is larger than the sum of its proper divisors (10415).

857473 is a wasteful number, since it uses less digits than its factorization.

857473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10414.

The product of its digits is 23520, while the sum is 34.

The square root of 857473 is about 925.9983801282. The cubic root of 857473 is about 95.0036194374.

The spelling of 857473 in words is "eight hundred fifty-seven thousand, four hundred seventy-three".