732721 has 8 divisors (see below), whose sum is σ = 813600. Its totient is φ = 654240.

The previous prime is 732713. The next prime is 732731. The reversal of 732721 is 127237.

732721 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 732721 - 2³ = 732713 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 732692 and 732701.

It is not an unprimeable number, because it can be changed into a prime (732731) 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, 85 + ... + 1213.

It is an arithmetic number, because the mean of its divisors is an integer number (101700).

2⁷³²⁷²¹ is an apocalyptic number.

It is an amenable number.

732721 is a deficient number, since it is larger than the sum of its proper divisors (80879).

732721 is a wasteful number, since it uses less digits than its factorization.

732721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1199.

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

The square root of 732721 is about 855.9912382729. The cubic root of 732721 is about 90.1528677744.

Adding to 732721 its reverse (127237), we get a palindrome (859958).

The spelling of 732721 in words is "seven hundred thirty-two thousand, seven hundred twenty-one".