2800249 has 2 divisors, whose sum is σ = 2800250. Its totient is φ = 2800248.

The previous prime is 2800247. The next prime is 2800267. The reversal of 2800249 is 9420082.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1863225 + 937024 = 1365^2 + 968^2 .

It is a cyclic number.

It is not a de Polignac number, because 2800249 - 2¹ = 2800247 is a prime.

Together with 2800247, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (2800241) by changing a digit.

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, 1400124 + 1400125.

It is an arithmetic number, because the mean of its divisors is an integer number (1400125).

2^2800249 is an apocalyptic number.

It is an amenable number.

2800249 is a deficient number, since it is larger than the sum of its proper divisors (1).

2800249 is an equidigital number, since it uses as much as digits as its factorization.

2800249 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 2800249 is about 1673.3944543950. The cubic root of 2800249 is about 140.9501525588.

The spelling of 2800249 in words is "two million, eight hundred thousand, two hundred forty-nine".