2786281 has 2 divisors, whose sum is σ = 2786282. Its totient is φ = 2786280.

The previous prime is 2786257. The next prime is 2786321. The reversal of 2786281 is 1826872.

2786281 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1960000 + 826281 = 1400^2 + 909^2 .

It is a cyclic number.

It is not a de Polignac number, because 2786281 - 2⁷ = 2786153 is a prime.

It is a super-2 number, since 2×2786281² = 15526723621922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2786221) 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 as a sum of consecutive naturals, namely, 1393140 + 1393141.

It is an arithmetic number, because the mean of its divisors is an integer number (1393141).

2^2786281 is an apocalyptic number.

It is an amenable number.

2786281 is a deficient number, since it is larger than the sum of its proper divisors (1).

2786281 is an equidigital number, since it uses as much as digits as its factorization.

2786281 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10752, while the sum is 34.

The square root of 2786281 is about 1669.2156840864. The cubic root of 2786281 is about 140.7154026776.

The spelling of 2786281 in words is "two million, seven hundred eighty-six thousand, two hundred eighty-one".