2806161 has 16 divisors (see below), whose sum is σ = 3969024. Its totient is φ = 1759824.

The previous prime is 2806157. The next prime is 2806169. The reversal of 2806161 is 1616082.

It is not a de Polignac number, because 2806161 - 2² = 2806157 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2806169) 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, 4320 + ... + 4926.

It is an arithmetic number, because the mean of its divisors is an integer number (248064).

2^2806161 is an apocalyptic number.

It is an amenable number.

2806161 is a deficient number, since it is larger than the sum of its proper divisors (1162863).

2806161 is a wasteful number, since it uses less digits than its factorization.

2806161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 700.

The product of its (nonzero) digits is 576, while the sum is 24.

The square root of 2806161 is about 1675.1599923589. The cubic root of 2806161 is about 141.0492760723.

It can be divided in two parts, 280 and 6161, that added together give a triangular number (6441 = T₁₁₃).

The spelling of 2806161 in words is "two million, eight hundred six thousand, one hundred sixty-one".