6521087 has 2 divisors, whose sum is σ = 6521088. Its totient is φ = 6521086.

The previous prime is 6521077. The next prime is 6521089. The reversal of 6521087 is 7801256.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6521087 - 2⁴ = 6521071 is a prime.

Together with 6521089, it forms a pair of twin primes.

It is a Chen prime.

It is a zygodrome in base 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6521089) 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 as a sum of consecutive naturals, namely, 3260543 + 3260544.

It is an arithmetic number, because the mean of its divisors is an integer number (3260544).

Almost surely, 2^6521087 is an apocalyptic number.

6521087 is a deficient number, since it is larger than the sum of its proper divisors (1).

6521087 is an equidigital number, since it uses as much as digits as its factorization.

6521087 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3360, while the sum is 29.

The square root of 6521087 is about 2553.6419091173. The cubic root of 6521087 is about 186.8271540019.

The spelling of 6521087 in words is "six million, five hundred twenty-one thousand, eighty-seven".