8158161 has 16 divisors (see below), whose sum is σ = 11943360. Its totient is φ = 4912320.

The previous prime is 8158133. The next prime is 8158187. The reversal of 8158161 is 1618518.

It is a happy number.

It is not a de Polignac number, because 8158161 - 2⁶ = 8158097 is a prime.

It is not an unprimeable number, because it can be changed into a prime (8158061) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4995 + ... + 6423.

It is an arithmetic number, because the mean of its divisors is an integer number (746460).

Almost surely, 2^8158161 is an apocalyptic number.

It is an amenable number.

8158161 is a deficient number, since it is larger than the sum of its proper divisors (3785199).

8158161 is a wasteful number, since it uses less digits than its factorization.

8158161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1616.

The product of its digits is 1920, while the sum is 30.

The square root of 8158161 is about 2856.2494638949. The cubic root of 8158161 is about 201.3094167630.

The spelling of 8158161 in words is "eight million, one hundred fifty-eight thousand, one hundred sixty-one".