722172 has 24 divisors (see below), whose sum is σ = 1838592. Its totient is φ = 218800.

The previous prime is 722167. The next prime is 722173. The reversal of 722172 is 271227.

722172 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (722173) by changing a digit.

722172 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2604 + ... + 2867.

It is an arithmetic number, because the mean of its divisors is an integer number (76608).

2⁷²²¹⁷² is an apocalyptic number.

It is an amenable number.

722172 is an abundant number, since it is smaller than the sum of its proper divisors (1116420).

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

722172 is a wasteful number, since it uses less digits than its factorization.

722172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5489 (or 5487 counting only the distinct ones).

The product of its digits is 392, while the sum is 21.

The square root of 722172 is about 849.8070369207. The cubic root of 722172 is about 89.7181304848.

Adding to 722172 its reverse (271227), we get a palindrome (993399).

The spelling of 722172 in words is "seven hundred twenty-two thousand, one hundred seventy-two", and thus it is an iban number.