6561115 has 8 divisors (see below), whose sum is σ = 8589168. Its totient is φ = 4771680.

The previous prime is 6561103. The next prime is 6561127. The reversal of 6561115 is 5111656.

It is an interprime number because it is at equal distance from previous prime (6561103) and next prime (6561127).

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

It is not a de Polignac number, because 6561115 - 2⁷ = 6560987 is a prime.

It is a super-3 number, since 3×6561115³ (a number of 21 digits) contains 333 as substring.

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 6561115.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59592 + ... + 59701.

It is an arithmetic number, because the mean of its divisors is an integer number (1073646).

Almost surely, 2^6561115 is an apocalyptic number.

6561115 is a deficient number, since it is larger than the sum of its proper divisors (2028053).

6561115 is a wasteful number, since it uses less digits than its factorization.

6561115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119309.

The product of its digits is 900, while the sum is 25.

The square root of 6561115 is about 2561.4673529054. The cubic root of 6561115 is about 187.2086378481.

It can be divided in two parts, 656 and 1115, that added together give a palindrome (1771).

The spelling of 6561115 in words is "six million, five hundred sixty-one thousand, one hundred fifteen".