2781004 has 12 divisors (see below), whose sum is σ = 4888800. Its totient is φ = 1384208.

The previous prime is 2781001. The next prime is 2781007. The reversal of 2781004 is 4001872.

It is an interprime number because it is at equal distance from previous prime (2781001) and next prime (2781007).

It is not an unprimeable number, because it can be changed into a prime (2781001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 499 + ... + 2410.

It is an arithmetic number, because the mean of its divisors is an integer number (407400).

2^2781004 is an apocalyptic number.

It is an amenable number.

2781004 is a deficient number, since it is larger than the sum of its proper divisors (2107796).

2781004 is a wasteful number, since it uses less digits than its factorization.

2781004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3152 (or 3150 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 22.

The square root of 2781004 is about 1667.6342524666. The cubic root of 2781004 is about 140.6265118521.

Adding to 2781004 its reverse (4001872), we get a palindrome (6782876).

The spelling of 2781004 in words is "two million, seven hundred eighty-one thousand, four".