21410449 has 4 divisors (see below), whose sum is σ = 21600036. Its totient is φ = 21220864.

The previous prime is 21410437. The next prime is 21410471. The reversal of 21410449 is 94401412.

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

It can be written as a sum of positive squares in 2 ways, for example, as 753424 + 20657025 = 868^2 + 4545^2 .

It is a cyclic number.

It is not a de Polignac number, because 21410449 - 2¹³ = 21402257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21410419) 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 3 ways as a sum of consecutive naturals, for example, 94624 + ... + 94849.

It is an arithmetic number, because the mean of its divisors is an integer number (5400009).

Almost surely, 2^21410449 is an apocalyptic number.

It is an amenable number.

21410449 is a deficient number, since it is larger than the sum of its proper divisors (189587).

21410449 is a wasteful number, since it uses less digits than its factorization.

21410449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 189586.

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 21410449 is about 4627.1426388215. The cubic root of 21410449 is about 277.6782892367.

The spelling of 21410449 in words is "twenty-one million, four hundred ten thousand, four hundred forty-nine".