1681100 has 18 divisors (see below), whose sum is σ = 3648204. Its totient is φ = 672400.

The previous prime is 1681091. The next prime is 1681103. The reversal of 1681100 is 11861.

It is a happy number.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (1681103) 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, 8306 + ... + 8505.

It is an arithmetic number, because the mean of its divisors is an integer number (202678).

2^1681100 is an apocalyptic number.

1681100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1681100 is an abundant number, since it is smaller than the sum of its proper divisors (1967104).

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

1681100 is a wasteful number, since it uses less digits than its factorization.

1681100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16825 (or 16818 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 17.

The square root of 1681100 is about 1296.5724044572. The cubic root of 1681100 is about 118.9043790856.

Adding to 1681100 its reverse (11861), we get a palindrome (1692961).

The spelling of 1681100 in words is "one million, six hundred eighty-one thousand, one hundred".