1681273 has 4 divisors (see below), whose sum is σ = 1834128. Its totient is φ = 1528420.

The previous prime is 1681271. The next prime is 1681279. The reversal of 1681273 is 3721861.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1681273 - 2¹ = 1681271 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1681271) 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 3 ways as a sum of consecutive naturals, for example, 76411 + ... + 76432.

It is an arithmetic number, because the mean of its divisors is an integer number (458532).

2^1681273 is an apocalyptic number.

It is an amenable number.

1681273 is a deficient number, since it is larger than the sum of its proper divisors (152855).

1681273 is a wasteful number, since it uses less digits than its factorization.

1681273 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152854.

The product of its digits is 2016, while the sum is 28.

The square root of 1681273 is about 1296.6391171024. The cubic root of 1681273 is about 118.9084577151.

It can be divided in two parts, 168 and 1273, that added together give a palindrome (1441).

The spelling of 1681273 in words is "one million, six hundred eighty-one thousand, two hundred seventy-three".