4332721 has 2 divisors, whose sum is σ = 4332722. Its totient is φ = 4332720.

The previous prime is 4332719. The next prime is 4332733. The reversal of 4332721 is 1272334.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3111696 + 1221025 = 1764^2 + 1105^2 .

It is a cyclic number.

It is not a de Polignac number, because 4332721 - 2¹ = 4332719 is a prime.

It is a super-4 number, since 4×4332721⁴ (a number of 28 digits) contains 4444 as substring.

Together with 4332719, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 4332692 and 4332701.

It is not a weakly prime, because it can be changed into another prime (4332761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2166360 + 2166361.

It is an arithmetic number, because the mean of its divisors is an integer number (2166361).

Almost surely, 2^4332721 is an apocalyptic number.

It is an amenable number.

4332721 is a deficient number, since it is larger than the sum of its proper divisors (1).

4332721 is an equidigital number, since it uses as much as digits as its factorization.

4332721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1008, while the sum is 22.

The square root of 4332721 is about 2081.5189165607. The cubic root of 4332721 is about 163.0247619425.

It can be divided in two parts, 43 and 32721, that multiplied together give a triangular number (1407003 = T₁₆₇₇).

The spelling of 4332721 in words is "four million, three hundred thirty-two thousand, seven hundred twenty-one".