6539641 has 4 divisors (see below), whose sum is σ = 6545232. Its totient is φ = 6534052.

The previous prime is 6539593. The next prime is 6539647. The reversal of 6539641 is 1469356.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 6539641 - 2⁷ = 6539513 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6539597 and 6539606.

It is not an unprimeable number, because it can be changed into a prime (6539647) 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, 295 + ... + 3628.

It is an arithmetic number, because the mean of its divisors is an integer number (1636308).

Almost surely, 2^6539641 is an apocalyptic number.

It is an amenable number.

6539641 is a deficient number, since it is larger than the sum of its proper divisors (5591).

6539641 is a wasteful number, since it uses less digits than its factorization.

6539641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5590.

The product of its digits is 19440, while the sum is 34.

The square root of 6539641 is about 2557.2721794913. The cubic root of 6539641 is about 187.0041750333.

The spelling of 6539641 in words is "six million, five hundred thirty-nine thousand, six hundred forty-one".