25020517 has 2 divisors, whose sum is σ = 25020518. Its totient is φ = 25020516.

The previous prime is 25020491. The next prime is 25020529. The reversal of 25020517 is 71502052.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24740676 + 279841 = 4974^2 + 529^2 .

It is a cyclic number.

It is not a de Polignac number, because 25020517 - 2¹⁵ = 24987749 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25020557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12510258 + 12510259.

It is an arithmetic number, because the mean of its divisors is an integer number (12510259).

Almost surely, 2^25020517 is an apocalyptic number.

It is an amenable number.

25020517 is a deficient number, since it is larger than the sum of its proper divisors (1).

25020517 is an equidigital number, since it uses as much as digits as its factorization.

25020517 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 700, while the sum is 22.

The square root of 25020517 is about 5002.0512792254. The cubic root of 25020517 is about 292.4817413786.

Adding to 25020517 its reverse (71502052), we get a palindrome (96522569).

The spelling of 25020517 in words is "twenty-five million, twenty thousand, five hundred seventeen".