8121105 has 24 divisors (see below), whose sum is σ = 14152320. Its totient is φ = 4308000.

The previous prime is 8121103. The next prime is 8121119. The reversal of 8121105 is 5011218.

It is not a de Polignac number, because 8121105 - 2¹ = 8121103 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8121103) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10936 + ... + 11654.

It is an arithmetic number, because the mean of its divisors is an integer number (589680).

Almost surely, 2^8121105 is an apocalyptic number.

It is an amenable number.

8121105 is a deficient number, since it is larger than the sum of its proper divisors (6031215).

8121105 is a wasteful number, since it uses less digits than its factorization.

8121105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 981 (or 978 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 18.

The square root of 8121105 is about 2849.7552526489. The cubic root of 8121105 is about 201.0041582269.

The spelling of 8121105 in words is "eight million, one hundred twenty-one thousand, one hundred five".