6449905 has 24 divisors (see below), whose sum is σ = 9729216. Its totient is φ = 4018080.

The previous prime is 6449903. The next prime is 6449909. The reversal of 6449905 is 5099446.

It is not a de Polignac number, because 6449905 - 2¹ = 6449903 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6449903) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3474 + ... + 4996.

It is an arithmetic number, because the mean of its divisors is an integer number (405384).

Almost surely, 2^6449905 is an apocalyptic number.

It is an amenable number.

6449905 is a deficient number, since it is larger than the sum of its proper divisors (3279311).

6449905 is a wasteful number, since it uses less digits than its factorization.

6449905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1557 (or 1546 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 37.

The square root of 6449905 is about 2539.6663166645. Note that the first 3 decimals coincide. The cubic root of 6449905 is about 186.1448846078.

The spelling of 6449905 in words is "six million, four hundred forty-nine thousand, nine hundred five".