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405641 is a prime number
BaseRepresentation
bin1100011000010001001
3202121102202
41203002021
5100440031
612405545
73306425
oct1430211
9677382
10405641
11257845
121768b5
13112832
14a7b85
15802cb
hex63089

405641 has 2 divisors, whose sum is σ = 405642. Its totient is φ = 405640.

The previous prime is 405611. The next prime is 405659. The reversal of 405641 is 146504.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 395641 + 10000 = 629^2 + 100^2 .

It is a cyclic number.

It is not a de Polignac number, because 405641 - 26 = 405577 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (405611) 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, 202820 + 202821.

It is an arithmetic number, because the mean of its divisors is an integer number (202821).

2405641 is an apocalyptic number.

It is an amenable number.

405641 is a deficient number, since it is larger than the sum of its proper divisors (1).

405641 is an equidigital number, since it uses as much as digits as its factorization.

405641 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 405641 is about 636.8995211177. The cubic root of 405641 is about 74.0253747895.

The spelling of 405641 in words is "four hundred five thousand, six hundred forty-one".