726605 has 12 divisors (see below), whose sum is σ = 959196. Its totient is φ = 528000.

The previous prime is 726601. The next prime is 726611. The reversal of 726605 is 506627.

726605 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 81796 + 644809 = 286^2 + 803^2 .

It is not a de Polignac number, because 726605 - 2² = 726601 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (726601) 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, 5 + ... + 1205.

It is an arithmetic number, because the mean of its divisors is an integer number (79933).

2⁷²⁶⁶⁰⁵ is an apocalyptic number.

It is an amenable number.

726605 is a deficient number, since it is larger than the sum of its proper divisors (232591).

726605 is a wasteful number, since it uses less digits than its factorization.

726605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1228 (or 1217 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 26.

The square root of 726605 is about 852.4112857066. The cubic root of 726605 is about 89.9013321984.

It can be divided in two parts, 726 and 605, that added together give a palindrome (1331).

The spelling of 726605 in words is "seven hundred twenty-six thousand, six hundred five".