721372 has 12 divisors (see below), whose sum is σ = 1317456. Its totient is φ = 344960.

The previous prime is 721363. The next prime is 721379. The reversal of 721372 is 273127.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (721379) 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, 3829 + ... + 4012.

It is an arithmetic number, because the mean of its divisors is an integer number (109788).

2⁷²¹³⁷² is an apocalyptic number.

It is an amenable number.

721372 is a deficient number, since it is larger than the sum of its proper divisors (596084).

721372 is a wasteful number, since it uses less digits than its factorization.

721372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7868 (or 7866 counting only the distinct ones).

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

The square root of 721372 is about 849.3362114028. The cubic root of 721372 is about 89.6849892461.

Adding to 721372 its reverse (273127), we get a palindrome (994499).

It can be divided in two parts, 72 and 1372, that added together give a square (1444 = 38²).

The spelling of 721372 in words is "seven hundred twenty-one thousand, three hundred seventy-two", and thus it is an iban number.