1681055 has 4 divisors (see below), whose sum is σ = 2017272. Its totient is φ = 1344840.

The previous prime is 1681033. The next prime is 1681061. The reversal of 1681055 is 5501861.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5501861 = 71 ⋅77491.

It is a de Polignac number, because none of the positive numbers 2^k-1681055 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 168101 + ... + 168110.

It is an arithmetic number, because the mean of its divisors is an integer number (504318).

2^1681055 is an apocalyptic number.

1681055 is a deficient number, since it is larger than the sum of its proper divisors (336217).

1681055 is an equidigital number, since it uses as much as digits as its factorization.

1681055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 336216.

The product of its (nonzero) digits is 1200, while the sum is 26.

The square root of 1681055 is about 1296.5550508945. Note that the first 3 decimals coincide. The cubic root of 1681055 is about 118.9033181246.

The spelling of 1681055 in words is "one million, six hundred eighty-one thousand, fifty-five".