21441272 has 16 divisors (see below), whose sum is σ = 42318600. Its totient is φ = 10156320.

The previous prime is 21441271. The next prime is 21441289. The reversal of 21441272 is 27214412.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21441271) 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, 70379 + ... + 70682.

Almost surely, 2^21441272 is an apocalyptic number.

It is an amenable number.

21441272 is a deficient number, since it is larger than the sum of its proper divisors (20877328).

21441272 is a wasteful number, since it uses less digits than its factorization.

21441272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141086 (or 141082 counting only the distinct ones).

The product of its digits is 896, while the sum is 23.

The square root of 21441272 is about 4630.4721141586. The cubic root of 21441272 is about 277.8114761369.

Adding to 21441272 its reverse (27214412), we get a palindrome (48655684).

The spelling of 21441272 in words is "twenty-one million, four hundred forty-one thousand, two hundred seventy-two".