726506 has 8 divisors (see below), whose sum is σ = 1188864. Its totient is φ = 330220.

The previous prime is 726497. The next prime is 726521. The reversal of 726506 is 605627.

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

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 726506.

It is an unprimeable number.

726506 is an untouchable number, because it is not equal to the sum of proper divisors of any 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 3 ways as a sum of consecutive naturals, for example, 16490 + ... + 16533.

It is an arithmetic number, because the mean of its divisors is an integer number (148608).

2⁷²⁶⁵⁰⁶ is an apocalyptic number.

726506 is a deficient number, since it is larger than the sum of its proper divisors (462358).

726506 is a wasteful number, since it uses less digits than its factorization.

726506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33036.

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

The square root of 726506 is about 852.3532131693. The cubic root of 726506 is about 89.8972489912.

The spelling of 726506 in words is "seven hundred twenty-six thousand, five hundred six".