6328561 has 4 divisors (see below), whose sum is σ = 6370624. Its totient is φ = 6286500.

The previous prime is 6328541. The next prime is 6328601. The reversal of 6328561 is 1658236.

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.

It is a cyclic number.

It is not a de Polignac number, because 6328561 - 2⁵ = 6328529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6328541) 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, 20805 + ... + 21106.

It is an arithmetic number, because the mean of its divisors is an integer number (1592656).

Almost surely, 2^6328561 is an apocalyptic number.

It is an amenable number.

6328561 is a deficient number, since it is larger than the sum of its proper divisors (42063).

6328561 is a wasteful number, since it uses less digits than its factorization.

6328561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42062.

The product of its digits is 8640, while the sum is 31.

The square root of 6328561 is about 2515.6631332514. The cubic root of 6328561 is about 184.9701534514.

It can be divided in two parts, 6328 and 561, that added together give a square (6889 = 83²).

The spelling of 6328561 in words is "six million, three hundred twenty-eight thousand, five hundred sixty-one".