21083241 has 16 divisors (see below), whose sum is σ = 28957824. Its totient is φ = 13638144.

The previous prime is 21083239. The next prime is 21083263. The reversal of 21083241 is 14238012.

It is not a de Polignac number, because 21083241 - 2¹ = 21083239 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21083291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14740 + ... + 16106.

It is an arithmetic number, because the mean of its divisors is an integer number (1809864).

Almost surely, 2^21083241 is an apocalyptic number.

It is an amenable number.

21083241 is a deficient number, since it is larger than the sum of its proper divisors (7874583).

21083241 is a wasteful number, since it uses less digits than its factorization.

21083241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1520.

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 21083241 is about 4591.6490501779. The cubic root of 21083241 is about 276.2564697542.

The spelling of 21083241 in words is "twenty-one million, eighty-three thousand, two hundred forty-one".