726305 has 8 divisors (see below), whose sum is σ = 901800. Its totient is φ = 560896.

The previous prime is 726301. The next prime is 726307. The reversal of 726305 is 503627.

It can be written as a sum of positive squares in 4 ways, for example, as 71824 + 654481 = 268^2 + 809^2 .

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 726305 - 2² = 726301 is a prime.

It is not an unprimeable number, because it can be changed into a prime (726301) 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, 2360 + ... + 2649.

It is an arithmetic number, because the mean of its divisors is an integer number (112725).

2⁷²⁶³⁰⁵ is an apocalyptic number.

It is an amenable number.

726305 is a deficient number, since it is larger than the sum of its proper divisors (175495).

726305 is a wasteful number, since it uses less digits than its factorization.

726305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5043.

The product of its (nonzero) digits is 1260, while the sum is 23.

The square root of 726305 is about 852.2352961477. The cubic root of 726305 is about 89.8889577022. Note that the first 3 decimals are identical.

The spelling of 726305 in words is "seven hundred twenty-six thousand, three hundred five".