25205117 has 4 divisors (see below), whose sum is σ = 28805856. Its totient is φ = 21604380.

The previous prime is 25205111. The next prime is 25205137. The reversal of 25205117 is 71150252.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 25205117 - 2⁶ = 25205053 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25205092 and 25205101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25205111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1800359 + ... + 1800372.

It is an arithmetic number, because the mean of its divisors is an integer number (7201464).

Almost surely, 2^25205117 is an apocalyptic number.

It is an amenable number.

25205117 is a deficient number, since it is larger than the sum of its proper divisors (3600739).

25205117 is an equidigital number, since it uses as much as digits as its factorization.

25205117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3600738.

The product of its (nonzero) digits is 700, while the sum is 23.

The square root of 25205117 is about 5020.4697987340. The cubic root of 25205117 is about 293.1992843375.

Adding to 25205117 its reverse (71150252), we get a palindrome (96355369).

The spelling of 25205117 in words is "twenty-five million, two hundred five thousand, one hundred seventeen".