418321 has 2 divisors, whose sum is σ = 418322. Its totient is φ = 418320.
The previous prime is 418303. The next prime is 418331. The reversal of 418321 is 123814.
It is a strong prime.
It can be written as a sum of positive squares in only one way, i.e., 408321 + 10000 = 639^2 + 100^2 .
It is a cyclic number.
It is not a de Polignac number, because 418321 - 25 = 418289 is a prime.
It is an Ulam number.
It is an alternating number because its digits alternate between even and odd.
It is a nialpdrome in base 16.
It is not a weakly prime, because it can be changed into another prime (418331) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (7) of ones.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 209160 + 209161.
It is an arithmetic number, because the mean of its divisors is an integer number (209161).
2418321 is an apocalyptic number.
It is an amenable number.
418321 is a deficient number, since it is larger than the sum of its proper divisors (1).
418321 is an equidigital number, since it uses as much as digits as its factorization.
418321 is an odious number, because the sum of its binary digits is odd.
The product of its digits is 192, while the sum is 19.
The square root of 418321 is about 646.7773960181. Note that the first 3 decimals coincide. The cubic root of 418321 is about 74.7887984027.
The spelling of 418321 in words is "four hundred eighteen thousand, three hundred twenty-one".
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