2815289 has 2 divisors, whose sum is σ = 2815290. Its totient is φ = 2815288.

The previous prime is 2815271. The next prime is 2815301. The reversal of 2815289 is 9825182.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1605289 + 1210000 = 1267^2 + 1100^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2815289 is a prime.

It is not a weakly prime, because it can be changed into another prime (2815259) 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, 1407644 + 1407645.

It is an arithmetic number, because the mean of its divisors is an integer number (1407645).

2^2815289 is an apocalyptic number.

It is an amenable number.

2815289 is a deficient number, since it is larger than the sum of its proper divisors (1).

2815289 is an equidigital number, since it uses as much as digits as its factorization.

2815289 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11520, while the sum is 35.

The square root of 2815289 is about 1677.8822962294. The cubic root of 2815289 is about 141.2020475752.

The spelling of 2815289 in words is "two million, eight hundred fifteen thousand, two hundred eighty-nine".