Base | Representation |
---|---|
bin | 1100011110111111001 |
3 | 202210011011 |
4 | 1203313321 |
5 | 101042311 |
6 | 12433521 |
7 | 3322441 |
oct | 1436771 |
9 | 683134 |
10 | 409081 |
11 | 25a392 |
12 | 1788a1 |
13 | 11427a |
14 | a9121 |
15 | 81321 |
hex | 63df9 |
409081 has 2 divisors, whose sum is σ = 409082. Its totient is φ = 409080.
The previous prime is 409069. The next prime is 409099. The reversal of 409081 is 180904.
It is a weak prime.
It can be written as a sum of positive squares in only one way, i.e., 313600 + 95481 = 560^2 + 309^2 .
It is a cyclic number.
It is not a de Polignac number, because 409081 - 27 = 408953 is a prime.
It is a super-2 number, since 2×4090812 = 334694529122, which contains 22 as substring.
It is a Chen prime.
It is not a weakly prime, because it can be changed into another prime (409021) 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 as a sum of consecutive naturals, namely, 204540 + 204541.
It is an arithmetic number, because the mean of its divisors is an integer number (204541).
2409081 is an apocalyptic number.
It is an amenable number.
409081 is a deficient number, since it is larger than the sum of its proper divisors (1).
409081 is an equidigital number, since it uses as much as digits as its factorization.
409081 is an odious number, because the sum of its binary digits is odd.
The product of its (nonzero) digits is 288, while the sum is 22.
The square root of 409081 is about 639.5944027272. The cubic root of 409081 is about 74.2340410932.
Adding to 409081 its reverse (180904), we get a palindrome (589985).
The spelling of 409081 in words is "four hundred nine thousand, eighty-one".
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