1222320 has 80 divisors (see below), whose sum is σ = 4142592. Its totient is φ = 295680.

The previous prime is 1222307. The next prime is 1222373. The reversal of 1222320 is 232221.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 1222296 and 1222305.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2409 + ... + 2871.

2^1222320 is an apocalyptic number.

1222320 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 1222320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2071296).

1222320 is an abundant number, since it is smaller than the sum of its proper divisors (2920272).

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

1222320 is a wasteful number, since it uses less digits than its factorization.

1222320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 490 (or 484 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 12.

The square root of 1222320 is about 1105.5858175646. The cubic root of 1222320 is about 106.9206620655.

Adding to 1222320 its reverse (232221), we get a palindrome (1454541).

Subtracting from 1222320 its reverse (232221), we obtain a palindrome (990099).

It can be divided in two parts, 122 and 2320, that added together give a palindrome (2442).

The spelling of 1222320 in words is "one million, two hundred twenty-two thousand, three hundred twenty".