2786161 has 4 divisors (see below), whose sum is σ = 3184192. Its totient is φ = 2388132.

The previous prime is 2786153. The next prime is 2786177. The reversal of 2786161 is 1616872.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2786161 - 2³ = 2786153 is a prime.

It is a Duffinian number.

2786161 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2786461) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 199005 + ... + 199018.

It is an arithmetic number, because the mean of its divisors is an integer number (796048).

2^2786161 is an apocalyptic number.

It is an amenable number.

2786161 is a deficient number, since it is larger than the sum of its proper divisors (398031).

2786161 is an equidigital number, since it uses as much as digits as its factorization.

2786161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 398030.

The product of its digits is 4032, while the sum is 31.

The square root of 2786161 is about 1669.1797386741. The cubic root of 2786161 is about 140.7133825307.

The spelling of 2786161 in words is "two million, seven hundred eighty-six thousand, one hundred sixty-one".