1322320 has 20 divisors (see below), whose sum is σ = 3074580. Its totient is φ = 528896.

The previous prime is 1322317. The next prime is 1322323. The reversal of 1322320 is 232231.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1322317) and next prime (1322323).

It can be written as a sum of positive squares in 2 ways, for example, as 876096 + 446224 = 936^2 + 668^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a self number, because there is not a number n which added to its sum of digits gives 1322320.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1322323) 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, 8185 + ... + 8344.

It is an arithmetic number, because the mean of its divisors is an integer number (153729).

2^1322320 is an apocalyptic number.

1322320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1322320 is an abundant number, since it is smaller than the sum of its proper divisors (1752260).

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

1322320 is a wasteful number, since it uses less digits than its factorization.

1322320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16542 (or 16536 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 13.

The square root of 1322320 is about 1149.9217364673. The cubic root of 1322320 is about 109.7603598545.

Adding to 1322320 its reverse (232231), we get a palindrome (1554551).

The spelling of 1322320 in words is "one million, three hundred twenty-two thousand, three hundred twenty".