449268021 has 6 divisors (see below), whose sum is σ = 648942710. Its totient is φ = 299512008.

The previous prime is 449268019. The next prime is 449268047. The reversal of 449268021 is 120862944.

It can be written as a sum of positive squares in only one way, i.e., 411887025 + 37380996 = 20295^2 + 6114^2 .

It is not a de Polignac number, because 449268021 - 2¹ = 449268019 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (449268221) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 24959326 + ... + 24959343.

Almost surely, 2^449268021 is an apocalyptic number.

It is an amenable number.

449268021 is a deficient number, since it is larger than the sum of its proper divisors (199674689).

449268021 is a wasteful number, since it uses less digits than its factorization.

449268021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49918675 (or 49918672 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 449268021 is about 21195.9435034159. The cubic root of 449268021 is about 765.8937088209.

The spelling of 449268021 in words is "four hundred forty-nine million, two hundred sixty-eight thousand, twenty-one".