1797641 has 2 divisors, whose sum is σ = 1797642. Its totient is φ = 1797640.
The previous prime is 1797637. The next prime is 1797667. The reversal of 1797641 is 1467971.
It is a weak prime.
It can be written as a sum of positive squares in only one way, i.e., 1123600 + 674041 = 1060^2 + 821^2 .
It is an emirp because it is prime and its reverse (1467971) is a distict prime.
It is a cyclic number.
It is not a de Polignac number, because 1797641 - 22 = 1797637 is a prime.
It is a Chen prime.
It is not a weakly prime, because it can be changed into another prime (1797241) 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 as a sum of consecutive naturals, namely, 898820 + 898821.
It is an arithmetic number, because the mean of its divisors is an integer number (898821).
21797641 is an apocalyptic number.
It is an amenable number.
1797641 is a deficient number, since it is larger than the sum of its proper divisors (1).
1797641 is an equidigital number, since it uses as much as digits as its factorization.
1797641 is an odious number, because the sum of its binary digits is odd.
The product of its digits is 10584, while the sum is 35.
The square root of 1797641 is about 1340.7613508749. The cubic root of 1797641 is about 121.5908762560.
The spelling of 1797641 in words is "one million, seven hundred ninety-seven thousand, six hundred forty-one".
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