4281721 has 8 divisors (see below), whose sum is σ = 4394880. Its totient is φ = 4170192.

The previous prime is 4281709. The next prime is 4281731. The reversal of 4281721 is 1271824.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 4281721 - 2¹⁹ = 3757433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4281731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6231 + ... + 6883.

It is an arithmetic number, because the mean of its divisors is an integer number (549360).

Almost surely, 2^4281721 is an apocalyptic number.

It is an amenable number.

4281721 is a deficient number, since it is larger than the sum of its proper divisors (113159).

4281721 is an equidigital number, since it uses as much as digits as its factorization.

4281721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 815.

The product of its digits is 896, while the sum is 25.

The square root of 4281721 is about 2069.2319831280. The cubic root of 4281721 is about 162.3825865845.

The spelling of 4281721 in words is "four million, two hundred eighty-one thousand, seven hundred twenty-one".