25218041 has 2 divisors, whose sum is σ = 25218042. Its totient is φ = 25218040.

The previous prime is 25218031. The next prime is 25218077. The reversal of 25218041 is 14081252.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12996025 + 12222016 = 3605^2 + 3496^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25218041 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 25217998 and 25218016.

It is not a weakly prime, because it can be changed into another prime (25218031) 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, 12609020 + 12609021.

It is an arithmetic number, because the mean of its divisors is an integer number (12609021).

Almost surely, 2^25218041 is an apocalyptic number.

It is an amenable number.

25218041 is a deficient number, since it is larger than the sum of its proper divisors (1).

25218041 is an equidigital number, since it uses as much as digits as its factorization.

25218041 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 640, while the sum is 23.

The square root of 25218041 is about 5021.7567643206. The cubic root of 25218041 is about 293.2493887148.

Adding to 25218041 its reverse (14081252), we get a palindrome (39299293).

The spelling of 25218041 in words is "twenty-five million, two hundred eighteen thousand, forty-one".