726865 has 8 divisors (see below), whose sum is σ = 896040. Its totient is φ = 565632.

The previous prime is 726853. The next prime is 726893. The reversal of 726865 is 568627.

726865 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 4 ways, for example, as 85264 + 641601 = 292^2 + 801^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 726865 - 2¹⁹ = 202577 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 726865.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1780 + ... + 2149.

It is an arithmetic number, because the mean of its divisors is an integer number (112005).

2⁷²⁶⁸⁶⁵ is an apocalyptic number.

It is an amenable number.

726865 is a deficient number, since it is larger than the sum of its proper divisors (169175).

726865 is a wasteful number, since it uses less digits than its factorization.

726865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3971.

The product of its digits is 20160, while the sum is 34.

The square root of 726865 is about 852.5637806053. The cubic root of 726865 is about 89.9120540068.

The spelling of 726865 in words is "seven hundred twenty-six thousand, eight hundred sixty-five".