736321 has 4 divisors (see below), whose sum is σ = 779652. Its totient is φ = 692992.

The previous prime is 736279. The next prime is 736357. The reversal of 736321 is 123637.

736321 is nontrivially palindromic in base 5.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 680625 + 55696 = 825^2 + 236^2 .

It is a cyclic number.

It is not a de Polignac number, because 736321 - 2⁹ = 735809 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 736292 and 736301.

It is not an unprimeable number, because it can be changed into a prime (736361) 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, 21640 + ... + 21673.

It is an arithmetic number, because the mean of its divisors is an integer number (194913).

2⁷³⁶³²¹ is an apocalyptic number.

It is an amenable number.

736321 is a deficient number, since it is larger than the sum of its proper divisors (43331).

736321 is a wasteful number, since it uses less digits than its factorization.

736321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43330.

The product of its digits is 756, while the sum is 22.

The square root of 736321 is about 858.0914869639. The cubic root of 736321 is about 90.3002727866.

Adding to 736321 its reverse (123637), we get a palindrome (859958).

The spelling of 736321 in words is "seven hundred thirty-six thousand, three hundred twenty-one".