241921 has 2 divisors, whose sum is σ = 241922. Its totient is φ = 241920.

The previous prime is 241919. The next prime is 241931. The reversal of 241921 is 129142.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 172225 + 69696 = 415^2 + 264^2 .

It is a cyclic number.

It is not a de Polignac number, because 241921 - 2¹ = 241919 is a prime.

Together with 241919, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (241931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 120960 + 120961.

It is an arithmetic number, because the mean of its divisors is an integer number (120961).

2²⁴¹⁹²¹ is an apocalyptic number.

It is an amenable number.

241921 is a deficient number, since it is larger than the sum of its proper divisors (1).

241921 is an equidigital number, since it uses as much as digits as its factorization.

241921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 144, while the sum is 19.

The square root of 241921 is about 491.8546533276. The cubic root of 241921 is about 62.3100150768.

The spelling of 241921 in words is "two hundred forty-one thousand, nine hundred twenty-one".