6449605 has 4 divisors (see below), whose sum is σ = 7739532. Its totient is φ = 5159680.

The previous prime is 6449537. The next prime is 6449617. The reversal of 6449605 is 5069446.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 988036 + 5461569 = 994^2 + 2337^2 .

It is not a de Polignac number, because 6449605 - 2¹¹ = 6447557 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 644956 + ... + 644965.

It is an arithmetic number, because the mean of its divisors is an integer number (1934883).

Almost surely, 2^6449605 is an apocalyptic number.

It is an amenable number.

6449605 is a deficient number, since it is larger than the sum of its proper divisors (1289927).

6449605 is a wasteful number, since it uses less digits than its factorization.

6449605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1289926.

The product of its (nonzero) digits is 25920, while the sum is 34.

The square root of 6449605 is about 2539.6072531004. The cubic root of 6449605 is about 186.1419985533.

The spelling of 6449605 in words is "six million, four hundred forty-nine thousand, six hundred five".