2781082 has 4 divisors (see below), whose sum is σ = 4171626. Its totient is φ = 1390540.

The previous prime is 2781073. The next prime is 2781089. The reversal of 2781082 is 2801872.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 2595321 + 185761 = 1611^2 + 431^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 2781082.

It is not an unprimeable number, because it can be changed into a prime (2781089) 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 as a sum of consecutive naturals, namely, 695269 + ... + 695272.

2^2781082 is an apocalyptic number.

2781082 is a deficient number, since it is larger than the sum of its proper divisors (1390544).

2781082 is a wasteful number, since it uses less digits than its factorization.

2781082 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1390543.

The product of its (nonzero) digits is 1792, while the sum is 28.

The square root of 2781082 is about 1667.6576387256. The cubic root of 2781082 is about 140.6278265769.

The spelling of 2781082 in words is "two million, seven hundred eighty-one thousand, eighty-two".