722120 has 32 divisors (see below), whose sum is σ = 1857600. Its totient is φ = 247488.

The previous prime is 722119. The next prime is 722123. The reversal of 722120 is 21227.

722120 = 18² + 19² + ... + 129².

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a junction number, because it is equal to n+sod(n) for n = 722095 and 722104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (722123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1010 + ... + 1569.

It is an arithmetic number, because the mean of its divisors is an integer number (58050).

2⁷²²¹²⁰ is an apocalyptic number.

722120 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

722120 is an abundant number, since it is smaller than the sum of its proper divisors (1135480).

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

722120 is a wasteful number, since it uses less digits than its factorization.

722120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2597 (or 2593 counting only the distinct ones).

The product of its (nonzero) digits is 56, while the sum is 14.

The square root of 722120 is about 849.7764411891. The cubic root of 722120 is about 89.7159770482.

Adding to 722120 its reverse (21227), we get a palindrome (743347).

The spelling of 722120 in words is "seven hundred twenty-two thousand, one hundred twenty", and thus it is an iban number.