8561115 has 72 divisors (see below), whose sum is σ = 17117568. Its totient is φ = 3939840.

The previous prime is 8561107. The next prime is 8561117. The reversal of 8561115 is 5111658.

It is not a de Polignac number, because 8561115 - 2³ = 8561107 is a prime.

Its product of digits (1200) is a multiple of the sum of its prime divisors (75).

8561115 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (8561117) 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 71 ways as a sum of consecutive naturals, for example, 276150 + ... + 276180.

It is an arithmetic number, because the mean of its divisors is an integer number (237744).

Almost surely, 2^8561115 is an apocalyptic number.

8561115 is a gapful number since it is divisible by the number (85) formed by its first and last digit.

8561115 is a deficient number, since it is larger than the sum of its proper divisors (8556453).

8561115 is a wasteful number, since it uses less digits than its factorization.

8561115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97 (or 75 counting only the distinct ones).

The product of its digits is 1200, while the sum is 27.

The square root of 8561115 is about 2925.9383110380. The cubic root of 8561115 is about 204.5707058388.

The spelling of 8561115 in words is "eight million, five hundred sixty-one thousand, one hundred fifteen".