449863521 has 16 divisors (see below), whose sum is σ = 620430720. Its totient is φ = 289745280.

The previous prime is 449863517. The next prime is 449863541. The reversal of 449863521 is 125368944.

It is not a de Polignac number, because 449863521 - 2² = 449863517 is a prime.

It is not an unprimeable number, because it can be changed into a prime (449863541) 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, 5086 + ... + 30423.

It is an arithmetic number, because the mean of its divisors is an integer number (38776920).

Almost surely, 2^449863521 is an apocalyptic number.

449863521 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

It is an amenable number.

449863521 is a deficient number, since it is larger than the sum of its proper divisors (170567199).

449863521 is a wasteful number, since it uses less digits than its factorization.

449863521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35656.

The product of its digits is 207360, while the sum is 42.

The square root of 449863521 is about 21209.9863507735. The cubic root of 449863521 is about 766.2319540825.

The spelling of 449863521 in words is "four hundred forty-nine million, eight hundred sixty-three thousand, five hundred twenty-one".