2781094 has 4 divisors (see below), whose sum is σ = 4171644. Its totient is φ = 1390546.

The previous prime is 2781089. The next prime is 2781109. The reversal of 2781094 is 4901872.

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

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is an unprimeable number.

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, 695272 + ... + 695275.

It is an arithmetic number, because the mean of its divisors is an integer number (1042911).

2^2781094 is an apocalyptic number.

2781094 is a deficient number, since it is larger than the sum of its proper divisors (1390550).

2781094 is a wasteful number, since it uses less digits than its factorization.

2781094 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1390549.

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 2781094 is about 1667.6612365825. The cubic root of 2781094 is about 140.6280288401.

The spelling of 2781094 in words is "two million, seven hundred eighty-one thousand, ninety-four".