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409081 is a prime number
BaseRepresentation
bin1100011110111111001
3202210011011
41203313321
5101042311
612433521
73322441
oct1436771
9683134
10409081
1125a392
121788a1
1311427a
14a9121
1581321
hex63df9

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".