21241463 has 4 divisors (see below), whose sum is σ = 21254688. Its totient is φ = 21228240.

The previous prime is 21241457. The next prime is 21241469. The reversal of 21241463 is 36414212.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (21241457) and next prime (21241469).

It is a cyclic number.

It is not a de Polignac number, because 21241463 - 2⁶ = 21241399 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21241469) 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, 3806 + ... + 7547.

It is an arithmetic number, because the mean of its divisors is an integer number (5313672).

Almost surely, 2^21241463 is an apocalyptic number.

21241463 is a deficient number, since it is larger than the sum of its proper divisors (13225).

21241463 is a wasteful number, since it uses less digits than its factorization.

21241463 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13224.

The product of its digits is 1152, while the sum is 23.

The square root of 21241463 is about 4608.8461679687. The cubic root of 21241463 is about 276.9458160558.

Adding to 21241463 its reverse (36414212), we get a palindrome (57655675).

The spelling of 21241463 in words is "twenty-one million, two hundred forty-one thousand, four hundred sixty-three".