6539144 has 16 divisors (see below), whose sum is σ = 12383820. Its totient is φ = 3236800.

The previous prime is 6539129. The next prime is 6539149. The reversal of 6539144 is 4419356.

It can be written as a sum of positive squares in 2 ways, for example, as 6100900 + 438244 = 2470^2 + 662^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 6539144.

It is not an unprimeable number, because it can be changed into a prime (6539149) by changing a digit.

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, 3239 + ... + 4854.

Almost surely, 2^6539144 is an apocalyptic number.

It is an amenable number.

6539144 is a deficient number, since it is larger than the sum of its proper divisors (5844676).

6539144 is a wasteful number, since it uses less digits than its factorization.

6539144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8200 (or 8196 counting only the distinct ones).

The product of its digits is 12960, while the sum is 32.

The square root of 6539144 is about 2557.1750037884. The cubic root of 6539144 is about 186.9994375954. Note that the first 3 decimals are identical.

The spelling of 6539144 in words is "six million, five hundred thirty-nine thousand, one hundred forty-four".