1681892 has 18 divisors (see below), whose sum is σ = 3018834. Its totient is φ = 819840.

The previous prime is 1681891. The next prime is 1681903. The reversal of 1681892 is 2981861.

It can be written as a sum of positive squares in 3 ways, for example, as 440896 + 1240996 = 664^2 + 1114^2 .

It is not an unprimeable number, because it can be changed into a prime (1681891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 14828 + ... + 14940.

It is an arithmetic number, because the mean of its divisors is an integer number (167713).

2^1681892 is an apocalyptic number.

It is an amenable number.

1681892 is a deficient number, since it is larger than the sum of its proper divisors (1336942).

1681892 is a wasteful number, since it uses less digits than its factorization.

1681892 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 239 (or 176 counting only the distinct ones).

The product of its digits is 6912, while the sum is 35.

The square root of 1681892 is about 1296.8777891536. The cubic root of 1681892 is about 118.9230489017.

The spelling of 1681892 in words is "one million, six hundred eighty-one thousand, eight hundred ninety-two".