866225 has 6 divisors (see below), whose sum is σ = 1074150. Its totient is φ = 692960.

The previous prime is 866221. The next prime is 866231. The reversal of 866225 is 522668.

It can be written as a sum of positive squares in 3 ways, for example, as 5041 + 861184 = 71^2 + 928^2 .

It is not a de Polignac number, because 866225 - 2² = 866221 is a prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 866225.

It is not an unprimeable number, because it can be changed into a prime (866221) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 17300 + ... + 17349.

It is an arithmetic number, because the mean of its divisors is an integer number (179025).

2⁸⁶⁶²²⁵ is an apocalyptic number.

It is an amenable number.

866225 is a deficient number, since it is larger than the sum of its proper divisors (207925).

866225 is a wasteful number, since it uses less digits than its factorization.

866225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34659 (or 34654 counting only the distinct ones).

The product of its digits is 5760, while the sum is 29.

The square root of 866225 is about 930.7120929697. The cubic root of 866225 is about 95.3257515392.

The spelling of 866225 in words is "eight hundred sixty-six thousand, two hundred twenty-five".