4283821 has 2 divisors, whose sum is σ = 4283822. Its totient is φ = 4283820.

The previous prime is 4283801. The next prime is 4283843. The reversal of 4283821 is 1283824.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4247721 + 36100 = 2061^2 + 190^2 .

It is a cyclic number.

It is not a de Polignac number, because 4283821 - 2⁷ = 4283693 is a prime.

It is a super-2 number, since 2×4283821² = 36702244720082, which contains 22 as substring.

4283821 is a lucky number.

It is equal to p₃₀₁₇₈₉ and since 4283821 and 301789 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 4283821.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4283801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2141910 + 2141911.

It is an arithmetic number, because the mean of its divisors is an integer number (2141911).

Almost surely, 2^4283821 is an apocalyptic number.

It is an amenable number.

4283821 is a deficient number, since it is larger than the sum of its proper divisors (1).

4283821 is an equidigital number, since it uses as much as digits as its factorization.

4283821 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3072, while the sum is 28.

The square root of 4283821 is about 2069.7393555711. The cubic root of 4283821 is about 162.4091294705.

The spelling of 4283821 in words is "four million, two hundred eighty-three thousand, eight hundred twenty-one".