6449651 has 4 divisors (see below), whose sum is σ = 6945792. Its totient is φ = 5953512.

The previous prime is 6449617. The next prime is 6449659. The reversal of 6449651 is 1569446.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1569446 = 2 ⋅784723.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6449651 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6449659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 248051 + ... + 248076.

It is an arithmetic number, because the mean of its divisors is an integer number (1736448).

Almost surely, 2^6449651 is an apocalyptic number.

6449651 is a deficient number, since it is larger than the sum of its proper divisors (496141).

6449651 is a wasteful number, since it uses less digits than its factorization.

6449651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 496140.

The product of its digits is 25920, while the sum is 35.

The square root of 6449651 is about 2539.6163096027. The cubic root of 6449651 is about 186.1424410875.

The spelling of 6449651 in words is "six million, four hundred forty-nine thousand, six hundred fifty-one".