25220417 has 2 divisors, whose sum is σ = 25220418. Its totient is φ = 25220416.

The previous prime is 25220399. The next prime is 25220423. The reversal of 25220417 is 71402252.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24641296 + 579121 = 4964^2 + 761^2 .

It is a cyclic number.

It is not a de Polignac number, because 25220417 - 2⁸ = 25220161 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 25220392 and 25220401.

It is not a weakly prime, because it can be changed into another prime (25226417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12610208 + 12610209.

It is an arithmetic number, because the mean of its divisors is an integer number (12610209).

Almost surely, 2^25220417 is an apocalyptic number.

It is an amenable number.

25220417 is a deficient number, since it is larger than the sum of its proper divisors (1).

25220417 is an equidigital number, since it uses as much as digits as its factorization.

25220417 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1120, while the sum is 23.

The square root of 25220417 is about 5021.9933293464. The cubic root of 25220417 is about 293.2585982415.

Adding to 25220417 its reverse (71402252), we get a palindrome (96622669).

The spelling of 25220417 in words is "twenty-five million, two hundred twenty thousand, four hundred seventeen".