448961721 has 16 divisors (see below), whose sum is σ = 682585344. Its totient is φ = 260031744.

The previous prime is 448961717. The next prime is 448961729. The reversal of 448961721 is 127169844.

It is not a de Polignac number, because 448961721 - 2² = 448961717 is a prime.

It is not an unprimeable number, because it can be changed into a prime (448961729) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 337921 + ... + 339246.

It is an arithmetic number, because the mean of its divisors is an integer number (42661584).

Almost surely, 2^448961721 is an apocalyptic number.

It is an amenable number.

448961721 is a deficient number, since it is larger than the sum of its proper divisors (233623623).

448961721 is a wasteful number, since it uses less digits than its factorization.

448961721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 677200.

The product of its digits is 96768, while the sum is 42.

The square root of 448961721 is about 21188.7168323143. The cubic root of 448961721 is about 765.7196133549.

The spelling of 448961721 in words is "four hundred forty-eight million, nine hundred sixty-one thousand, seven hundred twenty-one".