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4221641 is a prime number
BaseRepresentation
bin10000000110101011001001
321221111000002
4100012223021
52040043031
6230252345
750611664
oct20065311
97844002
104221641
112423866
1214b70b5
13b4a718
147bc6db
15585ccb
hex406ac9

4221641 has 2 divisors, whose sum is σ = 4221642. Its totient is φ = 4221640.

The previous prime is 4221631. The next prime is 4221643. The reversal of 4221641 is 1461224.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3534400 + 687241 = 1880^2 + 829^2 .

It is a cyclic number.

It is not a de Polignac number, because 4221641 - 26 = 4221577 is a prime.

Together with 4221643, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (4221643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2110820 + 2110821.

It is an arithmetic number, because the mean of its divisors is an integer number (2110821).

Almost surely, 24221641 is an apocalyptic number.

It is an amenable number.

4221641 is a deficient number, since it is larger than the sum of its proper divisors (1).

4221641 is an equidigital number, since it uses as much as digits as its factorization.

4221641 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 384, while the sum is 20.

The square root of 4221641 is about 2054.6632327464. The cubic root of 4221641 is about 161.6195027805.

Adding to 4221641 its reverse (1461224), we get a palindrome (5682865).

The spelling of 4221641 in words is "four million, two hundred twenty-one thousand, six hundred forty-one".