21441241 has 8 divisors (see below), whose sum is σ = 22094720. Its totient is φ = 20791728.

The previous prime is 21441239. The next prime is 21441247. The reversal of 21441241 is 14214412.

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 21441241 - 2¹ = 21441239 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21441247) 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, 12790 + ... + 14368.

It is an arithmetic number, because the mean of its divisors is an integer number (2761840).

Almost surely, 2^21441241 is an apocalyptic number.

It is an amenable number.

21441241 is a deficient number, since it is larger than the sum of its proper divisors (653479).

21441241 is a wasteful number, since it uses less digits than its factorization.

21441241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1983.

The product of its digits is 256, while the sum is 19.

The square root of 21441241 is about 4630.4687667665. The cubic root of 21441241 is about 277.8113422494.

Adding to 21441241 its reverse (14214412), we get a palindrome (35655653).

The spelling of 21441241 in words is "twenty-one million, four hundred forty-one thousand, two hundred forty-one".