861725 has 6 divisors (see below), whose sum is σ = 1068570. Its totient is φ = 689360.

The previous prime is 861719. The next prime is 861733. The reversal of 861725 is 527168.

861725 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 3 ways, for example, as 76729 + 784996 = 277^2 + 886^2 .

It is not a de Polignac number, because 861725 - 2¹⁰ = 860701 is a prime.

It is a super-3 number, since 3×861725³ = 1919673336736359375, which contains 333 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 17210 + ... + 17259.

It is an arithmetic number, because the mean of its divisors is an integer number (178095).

2⁸⁶¹⁷²⁵ is an apocalyptic number.

It is an amenable number.

861725 is a deficient number, since it is larger than the sum of its proper divisors (206845).

861725 is a wasteful number, since it uses less digits than its factorization.

861725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34479 (or 34474 counting only the distinct ones).

The product of its digits is 3360, while the sum is 29.

The square root of 861725 is about 928.2914413049. The cubic root of 861725 is about 95.1603938655.

The spelling of 861725 in words is "eight hundred sixty-one thousand, seven hundred twenty-five".