2781874 has 4 divisors (see below), whose sum is σ = 4172814. Its totient is φ = 1390936.

The previous prime is 2781853. The next prime is 2781887. The reversal of 2781874 is 4781872.

2781874 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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., 2739025 + 42849 = 1655^2 + 207^2 .

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

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 as a sum of consecutive naturals, namely, 695467 + ... + 695470.

2^2781874 is an apocalyptic number.

2781874 is a deficient number, since it is larger than the sum of its proper divisors (1390940).

2781874 is a wasteful number, since it uses less digits than its factorization.

2781874 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1390939.

The product of its digits is 25088, while the sum is 37.

The square root of 2781874 is about 1667.8950806331. The cubic root of 2781874 is about 140.6411746992.

It can be divided in two parts, 2781 and 874, that added together give a triangular number (3655 = T₈₅).

The spelling of 2781874 in words is "two million, seven hundred eighty-one thousand, eight hundred seventy-four".