726505 has 8 divisors (see below), whose sum is σ = 938952. Its totient is φ = 536448.

The previous prime is 726497. The next prime is 726521. The reversal of 726505 is 505627.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 80089 + 646416 = 283^2 + 804^2 .

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 726505 - 2³ = 726497 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 726505.

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 7 ways as a sum of consecutive naturals, for example, 5524 + ... + 5653.

It is an arithmetic number, because the mean of its divisors is an integer number (117369).

2⁷²⁶⁵⁰⁵ is an apocalyptic number.

It is an amenable number.

726505 is a deficient number, since it is larger than the sum of its proper divisors (212447).

726505 is a wasteful number, since it uses less digits than its factorization.

726505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11195.

The product of its (nonzero) digits is 2100, while the sum is 25.

The square root of 726505 is about 852.3526265578. The cubic root of 726505 is about 89.8972077448.

The spelling of 726505 in words is "seven hundred twenty-six thousand, five hundred five".