1680104 has 24 divisors (see below), whose sum is σ = 3301410. Its totient is φ = 801504.

The previous prime is 1680103. The next prime is 1680121. The reversal of 1680104 is 4010861.

It can be written as a sum of positive squares in only one way, i.e., 1322500 + 357604 = 1150^2 + 598^2 .

It is not an unprimeable number, because it can be changed into a prime (1680101) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4034 + ... + 4430.

2^1680104 is an apocalyptic number.

It is an amenable number.

1680104 is a deficient number, since it is larger than the sum of its proper divisors (1621306).

1680104 is a wasteful number, since it uses less digits than its factorization.

1680104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 449 (or 422 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 20.

The square root of 1680104 is about 1296.1882579317. The cubic root of 1680104 is about 118.8808920518.

Adding to 1680104 its reverse (4010861), we get a palindrome (5690965).

The spelling of 1680104 in words is "one million, six hundred eighty thousand, one hundred four".