6561023 has 8 divisors (see below), whose sum is σ = 7893120. Its totient is φ = 5327640.

The previous prime is 6561019. The next prime is 6561073. The reversal of 6561023 is 3201656.

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

It is a cyclic number.

It is not a de Polignac number, because 6561023 - 2² = 6561019 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6561023.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6561013) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24533 + ... + 24798.

It is an arithmetic number, because the mean of its divisors is an integer number (986640).

Almost surely, 2^6561023 is an apocalyptic number.

6561023 is a deficient number, since it is larger than the sum of its proper divisors (1332097).

6561023 is a wasteful number, since it uses less digits than its factorization.

6561023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49357.

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 6561023 is about 2561.4493943859. The cubic root of 6561023 is about 187.2077628304.

Adding to 6561023 its reverse (3201656), we get a palindrome (9762679).

The spelling of 6561023 in words is "six million, five hundred sixty-one thousand, twenty-three".