21241283 has 16 divisors (see below), whose sum is σ = 24975360. Its totient is φ = 17690400.

The previous prime is 21241271. The next prime is 21241327. The reversal of 21241283 is 38214212.

It is a happy number.

It is not a de Polignac number, because 21241283 - 2¹² = 21237187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21241223) 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, 38993 + ... + 39533.

It is an arithmetic number, because the mean of its divisors is an integer number (1560960).

Almost surely, 2^21241283 is an apocalyptic number.

21241283 is a deficient number, since it is larger than the sum of its proper divisors (3734077).

21241283 is an equidigital number, since it uses as much as digits as its factorization.

21241283 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 698.

The product of its digits is 768, while the sum is 23.

The square root of 21241283 is about 4608.8266402632. The cubic root of 21241283 is about 276.9450337746.

Adding to 21241283 its reverse (38214212), we get a palindrome (59455495).

The spelling of 21241283 in words is "twenty-one million, two hundred forty-one thousand, two hundred eighty-three".