1724020 has 12 divisors (see below), whose sum is σ = 3620484. Its totient is φ = 689600.

The previous prime is 1723991. The next prime is 1724027. The reversal of 1724020 is 204271.

It can be written as a sum of positive squares in 2 ways, for example, as 345744 + 1378276 = 588^2 + 1174^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1723985 and 1724003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1724027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43081 + ... + 43120.

It is an arithmetic number, because the mean of its divisors is an integer number (301707).

2^1724020 is an apocalyptic number.

1724020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1724020 is an abundant number, since it is smaller than the sum of its proper divisors (1896464).

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

1724020 is a wasteful number, since it uses less digits than its factorization.

1724020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86210 (or 86208 counting only the distinct ones).

The product of its (nonzero) digits is 112, while the sum is 16.

The square root of 1724020 is about 1313.0194210293. The cubic root of 1724020 is about 119.9077995475.

Adding to 1724020 its reverse (204271), we get a palindrome (1928291).

The spelling of 1724020 in words is "one million, seven hundred twenty-four thousand, twenty".