2861312 has 18 divisors (see below), whose sum is σ = 5711958. Its totient is φ = 1430528.

The previous prime is 2861303. The next prime is 2861317. The reversal of 2861312 is 2131682.

It can be written as a sum of positive squares in only one way, i.e., 2768896 + 92416 = 1664^2 + 304^2 .

It is a super-2 number, since 2×2861312² = 16374212722688, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2861317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5333 + ... + 5844.

It is an arithmetic number, because the mean of its divisors is an integer number (317331).

2^2861312 is an apocalyptic number.

It is an amenable number.

2861312 is a deficient number, since it is larger than the sum of its proper divisors (2850646).

2861312 is an equidigital number, since it uses as much as digits as its factorization.

2861312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11193 (or 11179 counting only the distinct ones).

The product of its digits is 576, while the sum is 23.

The square root of 2861312 is about 1691.5413089842. The cubic root of 2861312 is about 141.9673270064.

Adding to 2861312 its reverse (2131682), we get a palindrome (4992994).

The spelling of 2861312 in words is "two million, eight hundred sixty-one thousand, three hundred twelve".