241621 has 8 divisors (see below), whose sum is σ = 261144. Its totient is φ = 222720.

The previous prime is 241603. The next prime is 241639. The reversal of 241621 is 126142.

It is an interprime number because it is at equal distance from previous prime (241603) and next prime (241639).

It can be written as a sum of positive squares in 4 ways, for example, as 1521 + 240100 = 39^2 + 490^2 .

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 241621 - 2⁵ = 241589 is a prime.

It is a Duffinian number.

241621 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 241595 and 241604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (241601) 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 7 ways as a sum of consecutive naturals, for example, 921 + ... + 1153.

It is an arithmetic number, because the mean of its divisors is an integer number (32643).

2²⁴¹⁶²¹ is an apocalyptic number.

It is an amenable number.

241621 is a deficient number, since it is larger than the sum of its proper divisors (19523).

241621 is a wasteful number, since it uses less digits than its factorization.

241621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 311.

The product of its digits is 96, while the sum is 16.

The square root of 241621 is about 491.5495905806. The cubic root of 241621 is about 62.2842480747.

Adding to 241621 its reverse (126142), we get a palindrome (367763).

The spelling of 241621 in words is "two hundred forty-one thousand, six hundred twenty-one".