2781965 has 16 divisors (see below), whose sum is σ = 3691008. Its totient is φ = 2002176.

The previous prime is 2781959. The next prime is 2781983. The reversal of 2781965 is 5691872.

2781965 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 2781965 - 2⁴ = 2781949 is a prime.

It is a super-2 number, since 2×2781965² = 15478658522450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1244 + ... + 2666.

It is an arithmetic number, because the mean of its divisors is an integer number (230688).

2^2781965 is an apocalyptic number.

It is an amenable number.

2781965 is a deficient number, since it is larger than the sum of its proper divisors (909043).

2781965 is a wasteful number, since it uses less digits than its factorization.

2781965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1468.

The product of its digits is 30240, while the sum is 38.

The square root of 2781965 is about 1667.9223603034. The cubic root of 2781965 is about 140.6427082227.

The spelling of 2781965 in words is "two million, seven hundred eighty-one thousand, nine hundred sixty-five".