866125 has 24 divisors (see below), whose sum is σ = 1199016. Its totient is φ = 624000.

The previous prime is 866123. The next prime is 866161. The reversal of 866125 is 521668.

It can be written as a sum of positive squares in 12 ways, for example, as 857476 + 8649 = 926^2 + 93^2 .

It is not a de Polignac number, because 866125 - 2¹ = 866123 is a prime.

It is a Smith number, since the sum of its digits (28) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 866093 and 866102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (866123) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21105 + ... + 21145.

It is an arithmetic number, because the mean of its divisors is an integer number (49959).

2⁸⁶⁶¹²⁵ is an apocalyptic number.

It is an amenable number.

866125 is a deficient number, since it is larger than the sum of its proper divisors (332891).

866125 is a wasteful number, since it uses less digits than its factorization.

866125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82 (or 59 counting only the distinct ones).

The product of its digits is 2880, while the sum is 28.

The square root of 866125 is about 930.6583691130. The cubic root of 866125 is about 95.3220831536.

The spelling of 866125 in words is "eight hundred sixty-six thousand, one hundred twenty-five".