241721 has 8 divisors (see below), whose sum is σ = 255360. Its totient is φ = 228528.

The previous prime is 241711. The next prime is 241727. The reversal of 241721 is 127142.

241721 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-241721 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a Curzon number.

It is a plaindrome in base 11.

It is a self number, because there is not a number n which added to its sum of digits gives 241721.

It is not an unprimeable number, because it can be changed into a prime (241727) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1670 + ... + 1808.

It is an arithmetic number, because the mean of its divisors is an integer number (31920).

2²⁴¹⁷²¹ is an apocalyptic number.

It is an amenable number.

241721 is a deficient number, since it is larger than the sum of its proper divisors (13639).

241721 is a wasteful number, since it uses less digits than its factorization.

241721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223.

The product of its digits is 112, while the sum is 17.

The square root of 241721 is about 491.6512991949. The cubic root of 241721 is about 62.2928394440.

Adding to 241721 its reverse (127142), we get a palindrome (368863).

The spelling of 241721 in words is "two hundred forty-one thousand, seven hundred twenty-one", and thus it is an iban number.