1680734 has 16 divisors (see below), whose sum is σ = 2770416. Its totient is φ = 758400.

The previous prime is 1680709. The next prime is 1680743. The reversal of 1680734 is 4370861.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1680697 and 1680706.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5144 + ... + 5460.

It is an arithmetic number, because the mean of its divisors is an integer number (173151).

2^1680734 is an apocalyptic number.

1680734 is a deficient number, since it is larger than the sum of its proper divisors (1089682).

1680734 is a wasteful number, since it uses less digits than its factorization.

1680734 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 571.

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 1680734 is about 1296.4312554085. The cubic root of 1680734 is about 118.8957493866.

The spelling of 1680734 in words is "one million, six hundred eighty thousand, seven hundred thirty-four".