6499905 has 16 divisors (see below), whose sum is σ = 10431744. Its totient is φ = 3456000.

The previous prime is 6499903. The next prime is 6499939. The reversal of 6499905 is 5099946.

It is a happy number.

It is not a de Polignac number, because 6499905 - 2¹ = 6499903 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6499903) 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, 8280 + ... + 9030.

It is an arithmetic number, because the mean of its divisors is an integer number (651984).

Almost surely, 2^6499905 is an apocalyptic number.

It is an amenable number.

6499905 is a deficient number, since it is larger than the sum of its proper divisors (3931839).

6499905 is a wasteful number, since it uses less digits than its factorization.

6499905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1336.

The product of its (nonzero) digits is 87480, while the sum is 42.

The square root of 6499905 is about 2549.4911256955. The cubic root of 6499905 is about 186.6246486350.

The spelling of 6499905 in words is "six million, four hundred ninety-nine thousand, nine hundred five".