721160 has 48 divisors (see below), whose sum is σ = 1795500. Its totient is φ = 260480.

The previous prime is 721159. The next prime is 721163. The reversal of 721160 is 61127.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 662596 + 58564 = 814^2 + 242^2 .

It is not an unprimeable number, because it can be changed into a prime (721163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4766 + ... + 4914.

2⁷²¹¹⁶⁰ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 721160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (897750).

721160 is an abundant number, since it is smaller than the sum of its proper divisors (1074340).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

721160 is a wasteful number, since it uses less digits than its factorization.

721160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182 (or 167 counting only the distinct ones).

The product of its (nonzero) digits is 84, while the sum is 17.

The square root of 721160 is about 849.2113988872. The cubic root of 721160 is about 89.6762027113.

Adding to 721160 its reverse (61127), we get a palindrome (782287).

The spelling of 721160 in words is "seven hundred twenty-one thousand, one hundred sixty".