861125 has 12 divisors (see below), whose sum is σ = 1087788. Its totient is φ = 680600.

The previous prime is 861121. The next prime is 861131. The reversal of 861125 is 521168.

861125 = 58² + 59² + ... + 140².

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

861125 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 27556 + 833569 = 166^2 + 913^2 .

It is not a de Polignac number, because 861125 - 2² = 861121 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 861125.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (861121) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10334 + ... + 10416.

It is an arithmetic number, because the mean of its divisors is an integer number (90649).

2⁸⁶¹¹²⁵ is an apocalyptic number.

It is an amenable number.

861125 is a deficient number, since it is larger than the sum of its proper divisors (226663).

861125 is an frugal number, since it uses more digits than its factorization.

861125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181 (or 88 counting only the distinct ones).

The product of its digits is 480, while the sum is 23.

The square root of 861125 is about 927.9682106624. The cubic root of 861125 is about 95.1383027138.

The spelling of 861125 in words is "eight hundred sixty-one thousand, one hundred twenty-five".