449906421 has 16 divisors (see below), whose sum is σ = 619342848. Its totient is φ = 290289600.

The previous prime is 449906417. The next prime is 449906423. The reversal of 449906421 is 124609944.

It is not a de Polignac number, because 449906421 - 2² = 449906417 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 449906421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (449906423) 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, 10591 + ... + 31811.

It is an arithmetic number, because the mean of its divisors is an integer number (38708928).

Almost surely, 2^449906421 is an apocalyptic number.

It is an amenable number.

449906421 is a deficient number, since it is larger than the sum of its proper divisors (169436427).

449906421 is a wasteful number, since it uses less digits than its factorization.

449906421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21452.

The product of its (nonzero) digits is 62208, while the sum is 39.

The square root of 449906421 is about 21210.9976427324. The cubic root of 449906421 is about 766.2563098441.

The spelling of 449906421 in words is "four hundred forty-nine million, nine hundred six thousand, four hundred twenty-one".