6561030 has 64 divisors (see below), whose sum is σ = 18201600. Its totient is φ = 1482624.

The previous prime is 6561019. The next prime is 6561073. The reversal of 6561030 is 301656.

It is a super-2 number, since 2×6561030² = 86094229321800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an alternating number because its digits alternate between even and odd.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 6560988 and 6561006.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 32871 + ... + 33069.

It is an arithmetic number, because the mean of its divisors is an integer number (284400).

Almost surely, 2^6561030 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6561030, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9100800).

6561030 is an abundant number, since it is smaller than the sum of its proper divisors (11640570).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6561030 is a wasteful number, since it uses less digits than its factorization.

6561030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 373.

The product of its (nonzero) digits is 540, while the sum is 21.

The square root of 6561030 is about 2561.4507607994. The cubic root of 6561030 is about 187.2078294081.

Adding to 6561030 its reverse (301656), we get a palindrome (6862686).

The spelling of 6561030 in words is "six million, five hundred sixty-one thousand, thirty".