6561002 has 12 divisors (see below), whose sum is σ = 11448450. Its totient is φ = 2811816.

The previous prime is 6561001. The next prime is 6561007. The reversal of 6561002 is 2001656.

It can be written as a sum of positive squares in only one way, i.e., 4036081 + 2524921 = 2009^2 + 1589^2 .

It is not an unprimeable number, because it can be changed into a prime (6561001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 33377 + ... + 33572.

Almost surely, 2^6561002 is an apocalyptic number.

6561002 is a deficient number, since it is larger than the sum of its proper divisors (4887448).

6561002 is a wasteful number, since it uses less digits than its factorization.

6561002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66965 (or 66958 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 6561002 is about 2561.4452951410. The cubic root of 6561002 is about 187.2075630969.

Adding to 6561002 its reverse (2001656), we get a palindrome (8562658).

The spelling of 6561002 in words is "six million, five hundred sixty-one thousand, two".