1720004 has 48 divisors (see below), whose sum is σ = 3687936. Its totient is φ = 691200.

The previous prime is 1720003. The next prime is 1720031. The reversal of 1720004 is 4000271.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1720003) 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 15 ways as a sum of consecutive naturals, for example, 17684 + ... + 17780.

It is an arithmetic number, because the mean of its divisors is an integer number (76832).

2^1720004 is an apocalyptic number.

It is an amenable number.

1720004 is an abundant number, since it is smaller than the sum of its proper divisors (1967932).

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

1720004 is a wasteful number, since it uses less digits than its factorization.

1720004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156 (or 154 counting only the distinct ones).

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

The square root of 1720004 is about 1311.4892298452. The cubic root of 1720004 is about 119.8146211773.

Adding to 1720004 its reverse (4000271), we get a palindrome (5720275).

The spelling of 1720004 in words is "one million, seven hundred twenty thousand, four".