21241304 has 32 divisors (see below), whose sum is σ = 46452000. Its totient is φ = 9102240.

The previous prime is 21241271. The next prime is 21241327. The reversal of 21241304 is 40314212.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 1127 + ... + 6614.

It is an arithmetic number, because the mean of its divisors is an integer number (1451625).

Almost surely, 2^21241304 is an apocalyptic number.

It is an amenable number.

21241304 is an abundant number, since it is smaller than the sum of its proper divisors (25210696).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21241304 is an equidigital number, since it uses as much as digits as its factorization.

21241304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7768 (or 7750 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 21241304 is about 4608.8289184998. The cubic root of 21241304 is about 276.9451250410.

Adding to 21241304 its reverse (40314212), we get a palindrome (61555516).

The spelling of 21241304 in words is "twenty-one million, two hundred forty-one thousand, three hundred four".