1681734 has 16 divisors (see below), whose sum is σ = 3391488. Its totient is φ = 555912.

The previous prime is 1681723. The next prime is 1681787. The reversal of 1681734 is 4371861.

It is a happy number.

It is a plaindrome in base 15.

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, 342 + ... + 1865.

It is an arithmetic number, because the mean of its divisors is an integer number (211968).

2^1681734 is an apocalyptic number.

1681734 is an abundant number, since it is smaller than the sum of its proper divisors (1709754).

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

1681734 is a wasteful number, since it uses less digits than its factorization.

1681734 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2339.

The product of its digits is 4032, while the sum is 30.

The square root of 1681734 is about 1296.8168721913. The cubic root of 1681734 is about 118.9193248357.

It can be divided in two parts, 1681 and 734, that added together give a triangular number (2415 = T₆₉).

The spelling of 1681734 in words is "one million, six hundred eighty-one thousand, seven hundred thirty-four".