1681794 has 24 divisors (see below), whose sum is σ = 3668652. Its totient is φ = 556800.

The previous prime is 1681787. The next prime is 1681807. The reversal of 1681794 is 4971861.

It can be written as a sum of positive squares in 2 ways, for example, as 1625625 + 56169 = 1275^2 + 237^2 .

It is a plaindrome in base 15.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3994 + ... + 4394.

2^1681794 is an apocalyptic number.

1681794 is an abundant number, since it is smaller than the sum of its proper divisors (1986858).

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

1681794 is a wasteful number, since it uses less digits than its factorization.

1681794 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 642 (or 639 counting only the distinct ones).

The product of its digits is 12096, while the sum is 36.

The square root of 1681794 is about 1296.8400055520. The cubic root of 1681794 is about 118.9207390655.

It can be divided in two parts, 16 and 81794, that added together give a triangular number (81810 = T₄₀₄).

The spelling of 1681794 in words is "one million, six hundred eighty-one thousand, seven hundred ninety-four".