1681033 has 2 divisors, whose sum is σ = 1681034.
Its totient is φ = 1681032.
The previous prime is 1681027. The next prime is 1681061. The reversal of 1681033 is 3301861.
It is a weak prime.
It can be written as a sum of positive squares in only one way, i.e., 1261129 + 419904 = 1123^2 + 648^2
It is an emirp because it is prime and its reverse (3301861) is a distict prime.
It is a cyclic number.
It is a de Polignac number, because none of the positive numbers 2k-1681033 is a prime.
1681033 is a lucky number.
It is a junction number, because it is equal to n+sod(n) for n = 1680995 and 1681013.
It is not a weakly prime, because it can be changed into another prime (1681003) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 840516 + 840517.
It is an arithmetic number, because the mean of its divisors is an integer number (840517).
21681033 is an apocalyptic number.
It is an amenable number.
1681033 is a deficient number, since it is larger than the sum of its proper divisors (1).
1681033 is an equidigital number, since it uses as much as digits as its factorization.
1681033 is an evil number, because the sum of its binary digits is even.
The product of its (nonzero) digits is 432, while the sum is 22.
The square root of 1681033 is about 1296.5465668459.
The cubic root of 1681033 is about 118.9027994256.
Adding to 1681033 its reverse (3301861), we get a palindrome (4982894).
The spelling of 1681033 in words is "one million, six hundred eighty-one thousand, thirty-three".