25284247 has 2 divisors, whose sum is σ = 25284248. Its totient is φ = 25284246.

The previous prime is 25284241. The next prime is 25284271. The reversal of 25284247 is 74248252.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25284247 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25284241) 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, 12642123 + 12642124.

It is an arithmetic number, because the mean of its divisors is an integer number (12642124).

Almost surely, 2^25284247 is an apocalyptic number.

25284247 is a deficient number, since it is larger than the sum of its proper divisors (1).

25284247 is an equidigital number, since it uses as much as digits as its factorization.

25284247 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 35840, while the sum is 34.

The square root of 25284247 is about 5028.3443597272. The cubic root of 25284247 is about 293.5057911786.

The spelling of 25284247 in words is "twenty-five million, two hundred eighty-four thousand, two hundred forty-seven".