4083721 has 2 divisors, whose sum is σ = 4083722. Its totient is φ = 4083720.

The previous prime is 4083701. The next prime is 4083731. The reversal of 4083721 is 1273804.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2595321 + 1488400 = 1611^2 + 1220^2 .

It is a cyclic number.

It is not a de Polignac number, because 4083721 - 2¹⁷ = 3952649 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4083701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2041860 + 2041861.

It is an arithmetic number, because the mean of its divisors is an integer number (2041861).

Almost surely, 2^4083721 is an apocalyptic number.

It is an amenable number.

4083721 is a deficient number, since it is larger than the sum of its proper divisors (1).

4083721 is an equidigital number, since it uses as much as digits as its factorization.

4083721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 4083721 is about 2020.8218625104. The cubic root of 4083721 is about 159.8399571552.

The spelling of 4083721 in words is "four million, eighty-three thousand, seven hundred twenty-one".