2781275 has 24 divisors (see below), whose sum is σ = 4118784. Its totient is φ = 1821600.

The previous prime is 2781271. The next prime is 2781293. The reversal of 2781275 is 5721872.

2781275 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2781275 - 2² = 2781271 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2781271) by changing a digit.

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 in 23 ways as a sum of consecutive naturals, for example, 3680 + ... + 4370.

It is an arithmetic number, because the mean of its divisors is an integer number (171616).

2^2781275 is an apocalyptic number.

2781275 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

2781275 is a deficient number, since it is larger than the sum of its proper divisors (1337509).

2781275 is a wasteful number, since it uses less digits than its factorization.

2781275 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 731 (or 726 counting only the distinct ones).

The product of its digits is 7840, while the sum is 32.

The square root of 2781275 is about 1667.7155033158. The cubic root of 2781275 is about 140.6310795726.

The spelling of 2781275 in words is "two million, seven hundred eighty-one thousand, two hundred seventy-five".