2564249 has 2 divisors, whose sum is σ = 2564250. Its totient is φ = 2564248.

The previous prime is 2564207. The next prime is 2564251. The reversal of 2564249 is 9424652.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2458624 + 105625 = 1568^2 + 325^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2564249 is a prime.

Together with 2564251, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2564279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1282124 + 1282125.

It is an arithmetic number, because the mean of its divisors is an integer number (1282125).

2^2564249 is an apocalyptic number.

It is an amenable number.

2564249 is a deficient number, since it is larger than the sum of its proper divisors (1).

2564249 is an equidigital number, since it uses as much as digits as its factorization.

2564249 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17280, while the sum is 32.

The square root of 2564249 is about 1601.3272619924. The cubic root of 2564249 is about 136.8737181479.

The spelling of 2564249 in words is "two million, five hundred sixty-four thousand, two hundred forty-nine".