16859161 has 16 divisors (see below), whose sum is σ = 19721088. Its totient is φ = 14256000.

The previous prime is 16859149. The next prime is 16859203. The reversal of 16859161 is 16195861.

It is not a de Polignac number, because 16859161 - 2⁷ = 16859033 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 16859161.

It is not an unprimeable number, because it can be changed into a prime (16854161) 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, 8461 + ... + 10261.

It is an arithmetic number, because the mean of its divisors is an integer number (1232568).

Almost surely, 2^16859161 is an apocalyptic number.

16859161 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

16859161 is a deficient number, since it is larger than the sum of its proper divisors (2861927).

16859161 is a wasteful number, since it uses less digits than its factorization.

16859161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1872.

The product of its digits is 12960, while the sum is 37.

The square root of 16859161 is about 4105.9908670137. The cubic root of 16859161 is about 256.4161170762.

It can be divided in two parts, 16859 and 161, that added together give a triangular number (17020 = T₁₈₄).

The spelling of 16859161 in words is "sixteen million, eight hundred fifty-nine thousand, one hundred sixty-one".