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BaseRepresentation
bin1110111111000100001
3220221120201
41313320201
5111203131
614305201
74113415
oct1677041
9827521
10491041
11305a21
121b8201
13142675
159a761
hex77e21

491041 has 2 divisors, whose sum is σ = 491042. Its totient is φ = 491040.

The previous prime is 491039. The next prime is 491059. The reversal of 491041 is 140194.

491041 = 4952 + 4962.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 246016 + 245025 = 496^2 + 495^2 .

It is a cyclic number.

It is not a de Polignac number, because 491041 - 21 = 491039 is a prime.

It is a super-2 number, since 2×4910412 = 482242527362, which contains 22 as substring.

Together with 491039, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (491081) 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, 245520 + 245521.

It is an arithmetic number, because the mean of its divisors is an integer number (245521).

2491041 is an apocalyptic number.

491041 is the 496-th centered square number.

It is an amenable number.

491041 is a deficient number, since it is larger than the sum of its proper divisors (1).

491041 is an equidigital number, since it uses as much as digits as its factorization.

491041 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 491041 is about 700.7431769200. The cubic root of 491041 is about 78.8931418575.

The spelling of 491041 in words is "four hundred ninety-one thousand, forty-one".