8021449 has 4 divisors (see below), whose sum is σ = 8028036. Its totient is φ = 8014864.

The previous prime is 8021413. The next prime is 8021471. The reversal of 8021449 is 9441208.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 5107600 + 2913849 = 2260^2 + 1707^2 .

It is a cyclic number.

It is not a de Polignac number, because 8021449 - 2²¹ = 5924297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8021749) 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, 874 + ... + 4099.

It is an arithmetic number, because the mean of its divisors is an integer number (2007009).

Almost surely, 2^8021449 is an apocalyptic number.

It is an amenable number.

8021449 is a deficient number, since it is larger than the sum of its proper divisors (6587).

8021449 is a wasteful number, since it uses less digits than its factorization.

8021449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6586.

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 8021449 is about 2832.2162699907. The cubic root of 8021449 is about 200.1785821613.

The spelling of 8021449 in words is "eight million, twenty-one thousand, four hundred forty-nine".