6561359 has 4 divisors (see below), whose sum is σ = 7498704. Its totient is φ = 5624016.

The previous prime is 6561319. The next prime is 6561383. The reversal of 6561359 is 9531656.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 6561359 - 2⁸ = 6561103 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6561319) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 468662 + ... + 468675.

It is an arithmetic number, because the mean of its divisors is an integer number (1874676).

Almost surely, 2^6561359 is an apocalyptic number.

6561359 is a deficient number, since it is larger than the sum of its proper divisors (937345).

6561359 is an equidigital number, since it uses as much as digits as its factorization.

6561359 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 937344.

The product of its digits is 24300, while the sum is 35.

The square root of 6561359 is about 2561.5149814124. The cubic root of 6561359 is about 187.2109585076.

The spelling of 6561359 in words is "six million, five hundred sixty-one thousand, three hundred fifty-nine".