8160861 has 16 divisors (see below), whose sum is σ = 11851200. Its totient is φ = 4975488.

The previous prime is 8160851. The next prime is 8160913. The reversal of 8160861 is 1680618.

It is not a de Polignac number, because 8160861 - 2²¹ = 6063709 is a prime.

It is a super-2 number, since 2×8160861² = 133199304522642, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8160851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 816 + ... + 4121.

It is an arithmetic number, because the mean of its divisors is an integer number (740700).

Almost surely, 2^8160861 is an apocalyptic number.

It is an amenable number.

8160861 is a deficient number, since it is larger than the sum of its proper divisors (3690339).

8160861 is a wasteful number, since it uses less digits than its factorization.

8160861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4988.

The product of its (nonzero) digits is 2304, while the sum is 30.

The square root of 8160861 is about 2856.7220725860. The cubic root of 8160861 is about 201.3316225629.

The spelling of 8160861 in words is "eight million, one hundred sixty thousand, eight hundred sixty-one".