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5020021 is a prime number
BaseRepresentation
bin10011001001100101110101
3100110001011201
4103021211311
52241120041
6255332501
760445426
oct23114565
910401151
105020021
112919686
121821131
131069c36
1494964d
15692631
hex4c9975

5020021 has 2 divisors, whose sum is σ = 5020022. Its totient is φ = 5020020.

The previous prime is 5020019. The next prime is 5020031. The reversal of 5020021 is 1200205.

It is an a-pointer prime, because the next prime (5020031) can be obtained adding 5020021 to its sum of digits (10).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4363921 + 656100 = 2089^2 + 810^2 .

It is a cyclic number.

It is not a de Polignac number, because 5020021 - 21 = 5020019 is a prime.

It is a super-2 number, since 2×50200212 = 50401221680882, which contains 22 as substring.

Together with 5020019, it forms a pair of twin primes.

5020021 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5020031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2510010 + 2510011.

It is an arithmetic number, because the mean of its divisors is an integer number (2510011).

Almost surely, 25020021 is an apocalyptic number.

It is an amenable number.

5020021 is a deficient number, since it is larger than the sum of its proper divisors (1).

5020021 is an equidigital number, since it uses as much as digits as its factorization.

5020021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20, while the sum is 10.

The square root of 5020021 is about 2240.5403366153. The cubic root of 5020021 is about 171.2255268986.

Adding to 5020021 its reverse (1200205), we get a palindrome (6220226).

The spelling of 5020021 in words is "five million, twenty thousand, twenty-one".