1322720 has 48 divisors (see below), whose sum is σ = 3574368. Its totient is φ = 453120.

The previous prime is 1322693. The next prime is 1322731. The reversal of 1322720 is 272231.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 530 + ... + 1710.

It is an arithmetic number, because the mean of its divisors is an integer number (74466).

2^1322720 is an apocalyptic number.

1322720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1322720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1787184).

1322720 is an abundant number, since it is smaller than the sum of its proper divisors (2251648).

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

1322720 is a wasteful number, since it uses less digits than its factorization.

1322720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1203 (or 1195 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 17.

The square root of 1322720 is about 1150.0956481963. The cubic root of 1322720 is about 109.7714261919.

Adding to 1322720 its reverse (272231), we get a palindrome (1594951).

The spelling of 1322720 in words is "one million, three hundred twenty-two thousand, seven hundred twenty".