864725 has 6 divisors (see below), whose sum is σ = 1072290. Its totient is φ = 691760.

The previous prime is 864707. The next prime is 864733. The reversal of 864725 is 527468.

It can be written as a sum of positive squares in 3 ways, for example, as 14641 + 850084 = 121^2 + 922^2 .

It is a de Polignac number, because none of the positive numbers 2^k-864725 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 864691 and 864700.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 864725.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 17270 + ... + 17319.

It is an arithmetic number, because the mean of its divisors is an integer number (178715).

2⁸⁶⁴⁷²⁵ is an apocalyptic number.

It is an amenable number.

864725 is a deficient number, since it is larger than the sum of its proper divisors (207565).

864725 is a wasteful number, since it uses less digits than its factorization.

864725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34599 (or 34594 counting only the distinct ones).

The product of its digits is 13440, while the sum is 32.

The square root of 864725 is about 929.9059092188. The cubic root of 864725 is about 95.2706960812.

The spelling of 864725 in words is "eight hundred sixty-four thousand, seven hundred twenty-five".