21104241 has 8 divisors (see below), whose sum is σ = 28616160. Its totient is φ = 13830912.

The previous prime is 21104233. The next prime is 21104243. The reversal of 21104241 is 14240112.

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

It is not a de Polignac number, because 21104241 - 2³ = 21104233 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21104241.

It is not an unprimeable number, because it can be changed into a prime (21104243) 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, 59440 + ... + 59793.

It is an arithmetic number, because the mean of its divisors is an integer number (3577020).

Almost surely, 2^21104241 is an apocalyptic number.

It is an amenable number.

21104241 is a deficient number, since it is larger than the sum of its proper divisors (7511919).

21104241 is a wasteful number, since it uses less digits than its factorization.

21104241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119295.

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 21104241 is about 4593.9352411631. The cubic root of 21104241 is about 276.3481612351.

Adding to 21104241 its reverse (14240112), we get a palindrome (35344353).

The spelling of 21104241 in words is "twenty-one million, one hundred four thousand, two hundred forty-one".