241021 has 4 divisors (see below), whose sum is σ = 262944. Its totient is φ = 219100.

The previous prime is 241013. The next prime is 241027. The reversal of 241021 is 120142.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 241021 - 2³ = 241013 is a prime.

It is a super-2 number, since 2×241021² = 116182244882, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 240989 and 241007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (241027) 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 in 3 ways as a sum of consecutive naturals, for example, 10945 + ... + 10966.

It is an arithmetic number, because the mean of its divisors is an integer number (65736).

2²⁴¹⁰²¹ is an apocalyptic number.

It is an amenable number.

241021 is a deficient number, since it is larger than the sum of its proper divisors (21923).

241021 is a wasteful number, since it uses less digits than its factorization.

241021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21922.

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 241021 is about 490.9388964016. The cubic root of 241021 is about 62.2326500144.

Adding to 241021 its reverse (120142), we get a palindrome (361163).

The spelling of 241021 in words is "two hundred forty-one thousand, twenty-one", and thus it is an iban number.