726563 has 8 divisors (see below), whose sum is σ = 780480. Its totient is φ = 673920.

The previous prime is 726559. The next prime is 726589. The reversal of 726563 is 365627.

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 726563 - 2² = 726559 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (726533) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1073 + ... + 1613.

It is an arithmetic number, because the mean of its divisors is an integer number (97560).

2⁷²⁶⁵⁶³ is an apocalyptic number.

726563 is a deficient number, since it is larger than the sum of its proper divisors (53917).

726563 is a wasteful number, since it uses less digits than its factorization.

726563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 637.

The product of its digits is 7560, while the sum is 29.

The square root of 726563 is about 852.3866493558. The cubic root of 726563 is about 89.8995999740.

The spelling of 726563 in words is "seven hundred twenty-six thousand, five hundred sixty-three".