726523 has 6 divisors (see below), whose sum is σ = 845196. Its totient is φ = 622692.

The previous prime is 726521. The next prime is 726527. The reversal of 726523 is 325627.

It is not a de Polignac number, because 726523 - 2¹ = 726521 is a prime.

It is a d-powerful number, because it can be written as 7⁶ + 2¹² + 5² + 6⁵ + 2¹⁶ + 3¹² .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (726521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7365 + ... + 7462.

It is an arithmetic number, because the mean of its divisors is an integer number (140866).

2⁷²⁶⁵²³ is an apocalyptic number.

726523 is a deficient number, since it is larger than the sum of its proper divisors (118673).

726523 is a wasteful number, since it uses less digits than its factorization.

726523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14841 (or 14834 counting only the distinct ones).

The product of its digits is 2520, while the sum is 25.

The square root of 726523 is about 852.3631855025. The cubic root of 726523 is about 89.8979501744.

The spelling of 726523 in words is "seven hundred twenty-six thousand, five hundred twenty-three".