726539 has 6 divisors (see below), whose sum is σ = 795684. Its totient is φ = 657920.

The previous prime is 726533. The next prime is 726559. The reversal of 726539 is 935627.

It is a de Polignac number, because none of the positive numbers 2^k-726539 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 726539.

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 5 ways as a sum of consecutive naturals, for example, 2699 + ... + 2955.

It is an arithmetic number, because the mean of its divisors is an integer number (132614).

2⁷²⁶⁵³⁹ is an apocalyptic number.

726539 is a deficient number, since it is larger than the sum of its proper divisors (69145).

726539 is an equidigital number, since it uses as much as digits as its factorization.

726539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 525 (or 268 counting only the distinct ones).

The product of its digits is 11340, while the sum is 32.

The square root of 726539 is about 852.3725711213. The cubic root of 726539 is about 89.8986101015.

The spelling of 726539 in words is "seven hundred twenty-six thousand, five hundred thirty-nine".