1724 has 6 divisors (see below), whose sum is σ = 3024. Its totient is φ = 860.

The previous prime is 1723. The next prime is 1733. The reversal of 1724 is 4271.

Added to its reverse (4271) it gives a triangular number (5995 = T₁₀₉).

1724 = 11² + 12² + ... + 18².

It is a happy number.

It is an Ulam number.

It is a plaindrome in base 5, base 15 and base 16.

It is a nialpdrome in base 12.

It is a junction number, because it is equal to n+sod(n) for n = 1699 and 1708.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 212 + ... + 219.

It is an arithmetic number, because the mean of its divisors is an integer number (504).

It is an amenable number.

1724 is a deficient number, since it is larger than the sum of its proper divisors (1300).

1724 is a wasteful number, since it uses less digits than its factorization.

1724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 435 (or 433 counting only the distinct ones).

The product of its digits is 56, while the sum is 14.

The square root of 1724 is about 41.5210789841. The cubic root of 1724 is about 11.9907335870.

Adding to 1724 its reverse (4271), we get a palindrome (5995).

The spelling of 1724 in words is "one thousand, seven hundred twenty-four", and thus it is an iban number.