6503985 has 24 divisors (see below), whose sum is σ = 11868480. Its totient is φ = 3285792.

The previous prime is 6503977. The next prime is 6504011. The reversal of 6503985 is 5893056.

It is not a de Polignac number, because 6503985 - 2³ = 6503977 is a prime.

It is a Curzon number.

6503985 is a lucky number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2949 + ... + 4658.

It is an arithmetic number, because the mean of its divisors is an integer number (494520).

Almost surely, 2^6503985 is an apocalyptic number.

It is an amenable number.

6503985 is a deficient number, since it is larger than the sum of its proper divisors (5364495).

6503985 is a wasteful number, since it uses less digits than its factorization.

6503985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7637 (or 7634 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 36.

The square root of 6503985 is about 2550.2911598482. The cubic root of 6503985 is about 186.6636886571.

The spelling of 6503985 in words is "six million, five hundred three thousand, nine hundred eighty-five".