2781063 has 6 divisors (see below), whose sum is σ = 4017104. Its totient is φ = 1854036.

The previous prime is 2781061. The next prime is 2781067. The reversal of 2781063 is 3601872.

It is not a de Polignac number, because 2781063 - 2¹ = 2781061 is a prime.

It is a super-2 number, since 2×2781063² = 15468622819938, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2781061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 154495 + ... + 154512.

2^2781063 is an apocalyptic number.

2781063 is a deficient number, since it is larger than the sum of its proper divisors (1236041).

2781063 is a wasteful number, since it uses less digits than its factorization.

2781063 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 309013 (or 309010 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 2781063 is about 1667.6519421030. The cubic root of 2781063 is about 140.6275063257.

The spelling of 2781063 in words is "two million, seven hundred eighty-one thousand, sixty-three".