2161286 has 12 divisors (see below), whose sum is σ = 3316428. Its totient is φ = 1056132.

The previous prime is 2161279. The next prime is 2161297. The reversal of 2161286 is 6821612.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 16955 + ... + 17081.

It is an arithmetic number, because the mean of its divisors is an integer number (276369).

2^2161286 is an apocalyptic number.

2161286 is a deficient number, since it is larger than the sum of its proper divisors (1155142).

2161286 is an equidigital number, since it uses as much as digits as its factorization.

2161286 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 323 (or 196 counting only the distinct ones).

The product of its digits is 1152, while the sum is 26.

The square root of 2161286 is about 1470.1312866544. The cubic root of 2161286 is about 129.2917300440.

Adding to 2161286 its reverse (6821612), we get a palindrome (8982898).

The spelling of 2161286 in words is "two million, one hundred sixty-one thousand, two hundred eighty-six".