4108021 has 2 divisors, whose sum is σ = 4108022. Its totient is φ = 4108020.

The previous prime is 4107997. The next prime is 4108063. The reversal of 4108021 is 1208014.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4100625 + 7396 = 2025^2 + 86^2 .

It is a cyclic number.

It is not a de Polignac number, because 4108021 - 2⁷ = 4107893 is a prime.

4108021 is a lucky number.

It is equal to p₂₉₀₃₀₂ and since 4108021 and 290302 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 4107986 and 4108004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4108121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2054010 + 2054011.

It is an arithmetic number, because the mean of its divisors is an integer number (2054011).

Almost surely, 2^4108021 is an apocalyptic number.

It is an amenable number.

4108021 is a deficient number, since it is larger than the sum of its proper divisors (1).

4108021 is an equidigital number, since it uses as much as digits as its factorization.

4108021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64, while the sum is 16.

The square root of 4108021 is about 2026.8253501474. The cubic root of 4108021 is about 160.1563705643.

The spelling of 4108021 in words is "four million, one hundred eight thousand, twenty-one".