1681071 has 8 divisors (see below), whose sum is σ = 2561664. Its totient is φ = 960600.

The previous prime is 1681061. The next prime is 1681073. The reversal of 1681071 is 1701861.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1681071 - 2⁶ = 1681007 is a prime.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1681073) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 40005 + ... + 40046.

It is an arithmetic number, because the mean of its divisors is an integer number (320208).

2^1681071 is an apocalyptic number.

1681071 is a deficient number, since it is larger than the sum of its proper divisors (880593).

1681071 is an equidigital number, since it uses as much as digits as its factorization.

1681071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80061.

The product of its (nonzero) digits is 336, while the sum is 24.

The square root of 1681071 is about 1296.5612210767. The cubic root of 1681071 is about 118.9036953574.

The spelling of 1681071 in words is "one million, six hundred eighty-one thousand, seventy-one".