6520541 has 2 divisors, whose sum is σ = 6520542. Its totient is φ = 6520540.

The previous prime is 6520519. The next prime is 6520567. The reversal of 6520541 is 1450256.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4687225 + 1833316 = 2165^2 + 1354^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6520541 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6520511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3260270 + 3260271.

It is an arithmetic number, because the mean of its divisors is an integer number (3260271).

Almost surely, 2^6520541 is an apocalyptic number.

It is an amenable number.

6520541 is a deficient number, since it is larger than the sum of its proper divisors (1).

6520541 is an equidigital number, since it uses as much as digits as its factorization.

6520541 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 6520541 is about 2553.5350007392. The cubic root of 6520541 is about 186.8219396118.

Adding to 6520541 its reverse (1450256), we get a palindrome (7970797).

The spelling of 6520541 in words is "six million, five hundred twenty thousand, five hundred forty-one".