21464241 has 8 divisors (see below), whose sum is σ = 28825440. Its totient is φ = 14206272.

The previous prime is 21464239. The next prime is 21464249. The reversal of 21464241 is 14246412.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21464241 - 2¹ = 21464239 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21464249) 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 7 ways as a sum of consecutive naturals, for example, 25320 + ... + 26153.

It is an arithmetic number, because the mean of its divisors is an integer number (3603180).

Almost surely, 2^21464241 is an apocalyptic number.

It is an amenable number.

21464241 is a deficient number, since it is larger than the sum of its proper divisors (7361199).

21464241 is a wasteful number, since it uses less digits than its factorization.

21464241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51615.

The product of its digits is 1536, while the sum is 24.

The square root of 21464241 is about 4632.9516509456. The cubic root of 21464241 is about 277.9106427439.

The spelling of 21464241 in words is "twenty-one million, four hundred sixty-four thousand, two hundred forty-one".