6859161 has 21 divisors (see below), whose sum is σ = 10391151. Its totient is φ = 4525632.

The previous prime is 6859159. The next prime is 6859169. The reversal of 6859161 is 1619586.

6859161 = 83² + 84² + ... + 276².

The square root of 6859161 is 2619.

It is a perfect power (a square), and thus also a powerful number.

6859161 is a `hidden beast` number, since 6 + 8 + 591 + 61 = 666.

It can be written as a sum of positive squares in only one way, i.e., 3080025 + 3779136 = 1755^2 + 1944^2 .

It is not a de Polignac number, because 6859161 - 2¹ = 6859159 is a prime.

6859161 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (6859169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 20 ways as a sum of consecutive naturals, for example, 70665 + ... + 70761.

Almost surely, 2^6859161 is an apocalyptic number.

6859161 is the 2619-th square number.

6859161 is the 1310-th centered octagonal number.

It is an amenable number.

6859161 is a deficient number, since it is larger than the sum of its proper divisors (3531990).

6859161 is an frugal number, since it uses more digits than its factorization.

6859161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212 (or 100 counting only the distinct ones).

The product of its digits is 12960, while the sum is 36.

The cubic root of 6859161 is about 190.0014865996.

Multiplying 6859161 by its sum of digits (36), we get a square (246929796 = 15714²).

The spelling of 6859161 in words is "six million, eight hundred fifty-nine thousand, one hundred sixty-one".