6561125 has 8 divisors (see below), whose sum is σ = 8188440. Its totient is φ = 5248800.

The previous prime is 6561103. The next prime is 6561127. The reversal of 6561125 is 5211656.

It can be written as a sum of positive squares in 4 ways, for example, as 982081 + 5579044 = 991^2 + 2362^2 .

It is a de Polignac number, because none of the positive numbers 2^k-6561125 is a prime.

It is a super-2 number, since 2×6561125² = 86096722531250, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 6561094 and 6561103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6561127) 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 7 ways as a sum of consecutive naturals, for example, 26120 + ... + 26369.

It is an arithmetic number, because the mean of its divisors is an integer number (1023555).

Almost surely, 2^6561125 is an apocalyptic number.

It is an amenable number.

6561125 is a deficient number, since it is larger than the sum of its proper divisors (1627315).

6561125 is an equidigital number, since it uses as much as digits as its factorization.

6561125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52504 (or 52494 counting only the distinct ones).

The product of its digits is 1800, while the sum is 26.

The square root of 6561125 is about 2561.4693049108. The cubic root of 6561125 is about 187.2087329582.

The spelling of 6561125 in words is "six million, five hundred sixty-one thousand, one hundred twenty-five".