25865017 has 2 divisors, whose sum is σ = 25865018. Its totient is φ = 25865016.

The previous prime is 25865011. The next prime is 25865027. The reversal of 25865017 is 71056852.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21353641 + 4511376 = 4621^2 + 2124^2 .

It is a cyclic number.

It is not a de Polignac number, because 25865017 - 2¹⁹ = 25340729 is a prime.

It is not a weakly prime, because it can be changed into another prime (25865011) 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, 12932508 + 12932509.

It is an arithmetic number, because the mean of its divisors is an integer number (12932509).

Almost surely, 2^25865017 is an apocalyptic number.

It is an amenable number.

25865017 is a deficient number, since it is larger than the sum of its proper divisors (1).

25865017 is an equidigital number, since it uses as much as digits as its factorization.

25865017 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16800, while the sum is 34.

The square root of 25865017 is about 5085.7661173121. The cubic root of 25865017 is about 295.7360419254.

The spelling of 25865017 in words is "twenty-five million, eight hundred sixty-five thousand, seventeen".