8161205 has 32 divisors (see below), whose sum is σ = 11321856. Its totient is φ = 5601024.

The previous prime is 8161193. The next prime is 8161213. The reversal of 8161205 is 5021618.

8161205 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 8161205 - 2¹⁰ = 8160181 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 79184 + ... + 79286.

It is an arithmetic number, because the mean of its divisors is an integer number (353808).

Almost surely, 2^8161205 is an apocalyptic number.

It is an amenable number.

8161205 is a deficient number, since it is larger than the sum of its proper divisors (3160651).

8161205 is a wasteful number, since it uses less digits than its factorization.

8161205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197.

The product of its (nonzero) digits is 480, while the sum is 23.

The square root of 8161205 is about 2856.7822808188. The cubic root of 8161205 is about 201.3344513946.

The spelling of 8161205 in words is "eight million, one hundred sixty-one thousand, two hundred five".