1224320 has 32 divisors (see below), whose sum is σ = 2928420. Its totient is φ = 489472.

The previous prime is 1224299. The next prime is 1224329. The reversal of 1224320 is 234221.

It can be written as a sum of positive squares in 2 ways, for example, as 1201216 + 23104 = 1096^2 + 152^2 .

It is a tau number, because it is divible by the number of its divisors (32).

It is a junction number, because it is equal to n+sod(n) for n = 1224295 and 1224304.

It is not an unprimeable number, because it can be changed into a prime (1224329) 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, 317 + ... + 1596.

2^1224320 is an apocalyptic number.

1224320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1224320 is an abundant number, since it is smaller than the sum of its proper divisors (1704100).

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

1224320 is an equidigital number, since it uses as much as digits as its factorization.

1224320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1932 (or 1920 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 1224320 is about 1106.4899457293. The cubic root of 1224320 is about 106.9789459842.

Adding to 1224320 its reverse (234221), we get a palindrome (1458541).

Subtracting from 1224320 its reverse (234221), we obtain a palindrome (990099).

The spelling of 1224320 in words is "one million, two hundred twenty-four thousand, three hundred twenty".