6561123 has 8 divisors (see below), whose sum is σ = 8760000. Its totient is φ = 4368168.

The previous prime is 6561103. The next prime is 6561127. The reversal of 6561123 is 3211656.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 6561123 - 2⁵ = 6561091 is a prime.

It is a super-2 number, since 2×6561123² = 86096670042258, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 6561093 and 6561102.

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, 3628 + ... + 5126.

It is an arithmetic number, because the mean of its divisors is an integer number (1095000).

Almost surely, 2^6561123 is an apocalyptic number.

6561123 is a deficient number, since it is larger than the sum of its proper divisors (2198877).

6561123 is a wasteful number, since it uses less digits than its factorization.

6561123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2961.

The product of its digits is 1080, while the sum is 24.

The square root of 6561123 is about 2561.4689145098. The cubic root of 6561123 is about 187.2087139362.

Adding to 6561123 its reverse (3211656), we get a palindrome (9772779).

The spelling of 6561123 in words is "six million, five hundred sixty-one thousand, one hundred twenty-three".