25171117 has 2 divisors, whose sum is σ = 25171118. Its totient is φ = 25171116.

The previous prime is 25171109. The next prime is 25171123. The reversal of 25171117 is 71117152.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23483716 + 1687401 = 4846^2 + 1299^2 .

It is a cyclic number.

It is not a de Polignac number, because 25171117 - 2³ = 25171109 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 25171091 and 25171100.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25171717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12585558 + 12585559.

It is an arithmetic number, because the mean of its divisors is an integer number (12585559).

Almost surely, 2^25171117 is an apocalyptic number.

It is an amenable number.

25171117 is a deficient number, since it is larger than the sum of its proper divisors (1).

25171117 is an equidigital number, since it uses as much as digits as its factorization.

25171117 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 490, while the sum is 25.

The square root of 25171117 is about 5017.0825187553. The cubic root of 25171117 is about 293.0673896719.

Adding to 25171117 its reverse (71117152), we get a palindrome (96288269).

The spelling of 25171117 in words is "twenty-five million, one hundred seventy-one thousand, one hundred seventeen".