4033721 has 2 divisors, whose sum is σ = 4033722. Its totient is φ = 4033720.

The previous prime is 4033657. The next prime is 4033727. The reversal of 4033721 is 1273304.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2676496 + 1357225 = 1636^2 + 1165^2 .

It is a cyclic number.

It is not a de Polignac number, because 4033721 - 2⁶ = 4033657 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 4033693 and 4033702.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4033727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2016860 + 2016861.

It is an arithmetic number, because the mean of its divisors is an integer number (2016861).

Almost surely, 2^4033721 is an apocalyptic number.

It is an amenable number.

4033721 is a deficient number, since it is larger than the sum of its proper divisors (1).

4033721 is an equidigital number, since it uses as much as digits as its factorization.

4033721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 504, while the sum is 20.

The square root of 4033721 is about 2008.4125572203. The cubic root of 4033721 is about 159.1849304566.

The spelling of 4033721 in words is "four million, thirty-three thousand, seven hundred twenty-one".