6503945 has 24 divisors (see below), whose sum is σ = 9489984. Its totient is φ = 4190976.

The previous prime is 6503927. The next prime is 6503957. The reversal of 6503945 is 5493056.

It is a happy number.

6503945 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 6503945 - 2¹⁶ = 6438409 is a prime.

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 23 ways as a sum of consecutive naturals, for example, 9794 + ... + 10436.

It is an arithmetic number, because the mean of its divisors is an integer number (395416).

Almost surely, 2^6503945 is an apocalyptic number.

It is an amenable number.

6503945 is a deficient number, since it is larger than the sum of its proper divisors (2986039).

6503945 is a wasteful number, since it uses less digits than its factorization.

6503945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 689 (or 672 counting only the distinct ones).

The product of its (nonzero) digits is 16200, while the sum is 32.

The square root of 6503945 is about 2550.2833175943. The cubic root of 6503945 is about 186.6633059911.

The spelling of 6503945 in words is "six million, five hundred three thousand, nine hundred forty-five".