1680004 has 6 divisors (see below), whose sum is σ = 2940014. Its totient is φ = 840000.

The previous prime is 1679981. The next prime is 1680013. The reversal of 1680004 is 4000861.

It can be written as a sum of positive squares in only one way, i.e., 1557504 + 122500 = 1248^2 + 350^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 209997 + ... + 210004.

2^1680004 is an apocalyptic number.

It is an amenable number.

1680004 is a deficient number, since it is larger than the sum of its proper divisors (1260010).

1680004 is a wasteful number, since it uses less digits than its factorization.

1680004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 420005 (or 420003 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 1680004 is about 1296.1496827142. The cubic root of 1680004 is about 118.8785334032.

Adding to 1680004 its reverse (4000861), we get a palindrome (5680865).

The spelling of 1680004 in words is "one million, six hundred eighty thousand, four".