857745 has 36 divisors (see below), whose sum is σ = 1733940. Its totient is φ = 391104.

The previous prime is 857743. The next prime is 857749. The reversal of 857745 is 547758.

It can be written as a sum of positive squares in 2 ways, for example, as 254016 + 603729 = 504^2 + 777^2 .

It is not a de Polignac number, because 857745 - 2¹ = 857743 is a prime.

It is not an unprimeable number, because it can be changed into a prime (857741) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 2011 + ... + 2399.

It is an arithmetic number, because the mean of its divisors is an integer number (48165).

2⁸⁵⁷⁷⁴⁵ is an apocalyptic number.

It is an amenable number.

857745 is an abundant number, since it is smaller than the sum of its proper divisors (876195).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

857745 is a wasteful number, since it uses less digits than its factorization.

857745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 414 (or 404 counting only the distinct ones).

The product of its digits is 39200, while the sum is 36.

The square root of 857745 is about 926.1452369904. The cubic root of 857745 is about 95.0136637780.

The spelling of 857745 in words is "eight hundred fifty-seven thousand, seven hundred forty-five".