8121611 has 4 divisors (see below), whose sum is σ = 8341152. Its totient is φ = 7902072.

The previous prime is 8121587. The next prime is 8121613. The reversal of 8121611 is 1161218.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 8121611 - 2²² = 3927307 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8121613) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 109715 + ... + 109788.

It is an arithmetic number, because the mean of its divisors is an integer number (2085288).

Almost surely, 2^8121611 is an apocalyptic number.

8121611 is a deficient number, since it is larger than the sum of its proper divisors (219541).

8121611 is a wasteful number, since it uses less digits than its factorization.

8121611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219540.

The product of its digits is 96, while the sum is 20.

The square root of 8121611 is about 2849.8440308199. The cubic root of 8121611 is about 201.0083327816.

Adding to 8121611 its reverse (1161218), we get a palindrome (9282829).

The spelling of 8121611 in words is "eight million, one hundred twenty-one thousand, six hundred eleven".