21296841 has 4 divisors (see below), whose sum is σ = 28395792. Its totient is φ = 14197892.

The previous prime is 21296839. The next prime is 21296857. The reversal of 21296841 is 14869212.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21296841 - 2¹ = 21296839 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21296861) 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, 3549471 + ... + 3549476.

It is an arithmetic number, because the mean of its divisors is an integer number (7098948).

Almost surely, 2^21296841 is an apocalyptic number.

It is an amenable number.

21296841 is a deficient number, since it is larger than the sum of its proper divisors (7098951).

21296841 is an equidigital number, since it uses as much as digits as its factorization.

21296841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7098950.

The product of its digits is 6912, while the sum is 33.

The square root of 21296841 is about 4614.8500517352. The cubic root of 21296841 is about 277.1862796671.

The spelling of 21296841 in words is "twenty-one million, two hundred ninety-six thousand, eight hundred forty-one".