2812161 has 24 divisors (see below), whose sum is σ = 4221952. Its totient is φ = 1663200.

The previous prime is 2812153. The next prime is 2812169. The reversal of 2812161 is 1612182.

It is an interprime number because it is at equal distance from previous prime (2812153) and next prime (2812169).

It is not a de Polignac number, because 2812161 - 2³ = 2812153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2812169) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 22080 + ... + 22206.

2^2812161 is an apocalyptic number.

It is an amenable number.

2812161 is a deficient number, since it is larger than the sum of its proper divisors (1409791).

2812161 is a wasteful number, since it uses less digits than its factorization.

2812161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213 (or 202 counting only the distinct ones).

The product of its digits is 192, while the sum is 21.

The square root of 2812161 is about 1676.9499098065. The cubic root of 2812161 is about 141.1497327938.

Adding to 2812161 its sum of digits (21), we get a palindrome (2812182).

It can be divided in two parts, 28121 and 61, that added together give a palindrome (28182).

The spelling of 2812161 in words is "two million, eight hundred twelve thousand, one hundred sixty-one".