25171217 has 8 divisors (see below), whose sum is σ = 26371200. Its totient is φ = 23993424.

The previous prime is 25171213. The next prime is 25171231. The reversal of 25171217 is 71217152.

25171217 is an esthetic number in base 15, because in such base its adjacent digits differ by 1.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 25171217 - 2² = 25171213 is a prime.

It is a super-2 number, since 2×25171217² = 1267180330522178, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25171213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3203 + ... + 7784.

It is an arithmetic number, because the mean of its divisors is an integer number (3296400).

Almost surely, 2^25171217 is an apocalyptic number.

It is an amenable number.

25171217 is a deficient number, since it is larger than the sum of its proper divisors (1199983).

25171217 is a wasteful number, since it uses less digits than its factorization.

25171217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11095.

The product of its digits is 980, while the sum is 26.

The square root of 25171217 is about 5017.0924846967. The cubic root of 25171217 is about 293.0677777715.

Adding to 25171217 its reverse (71217152), we get a palindrome (96388369).

The spelling of 25171217 in words is "twenty-five million, one hundred seventy-one thousand, two hundred seventeen".