1724224 has 28 divisors (see below), whose sum is σ = 3543300. Its totient is φ = 831488.

The previous prime is 1724221. The next prime is 1724227. The reversal of 1724224 is 4224271.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1724221) and next prime (1724227).

It can be written as a sum of positive squares in 2 ways, for example, as 360000 + 1364224 = 600^2 + 1168^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1724195 and 1724204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1724221) 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, 1392 + ... + 2320.

2^1724224 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1724224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1771650).

1724224 is an abundant number, since it is smaller than the sum of its proper divisors (1819076).

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

1724224 is an equidigital number, since it uses as much as digits as its factorization.

1724224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 970 (or 960 counting only the distinct ones).

The product of its digits is 896, while the sum is 22.

The square root of 1724224 is about 1313.0971022739. The cubic root of 1724224 is about 119.9125288481.

Adding to 1724224 its reverse (4224271), we get a palindrome (5948495).

The spelling of 1724224 in words is "one million, seven hundred twenty-four thousand, two hundred twenty-four".