727321 has 4 divisors (see below), whose sum is σ = 831232. Its totient is φ = 623412.

The previous prime is 727313. The next prime is 727327. The reversal of 727321 is 123727.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 727321 - 2³ = 727313 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 727292 and 727301.

It is not an unprimeable number, because it can be changed into a prime (727327) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51945 + ... + 51958.

It is an arithmetic number, because the mean of its divisors is an integer number (207808).

2⁷²⁷³²¹ is an apocalyptic number.

It is an amenable number.

727321 is a deficient number, since it is larger than the sum of its proper divisors (103911).

727321 is a wasteful number, since it uses less digits than its factorization.

727321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103910.

The product of its digits is 588, while the sum is 22.

The square root of 727321 is about 852.8311673479. The cubic root of 727321 is about 89.9308522366.

The spelling of 727321 in words is "seven hundred twenty-seven thousand, three hundred twenty-one", and thus it is an iban number.