25415417 has 2 divisors, whose sum is σ = 25415418. Its totient is φ = 25415416.

The previous prime is 25415399. The next prime is 25415419. The reversal of 25415417 is 71451452.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14891881 + 10523536 = 3859^2 + 3244^2 .

It is a cyclic number.

It is not a de Polignac number, because 25415417 - 2¹⁸ = 25153273 is a prime.

Together with 25415419, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25415417.

It is not a weakly prime, because it can be changed into another prime (25415419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12707708 + 12707709.

It is an arithmetic number, because the mean of its divisors is an integer number (12707709).

Almost surely, 2^25415417 is an apocalyptic number.

It is an amenable number.

25415417 is a deficient number, since it is larger than the sum of its proper divisors (1).

25415417 is an equidigital number, since it uses as much as digits as its factorization.

25415417 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5600, while the sum is 29.

The square root of 25415417 is about 5041.3705477777. The cubic root of 25415417 is about 294.0124672702.

Adding to 25415417 its reverse (71451452), we get a palindrome (96866869).

The spelling of 25415417 in words is "twenty-five million, four hundred fifteen thousand, four hundred seventeen".