25321117 has 4 divisors (see below), whose sum is σ = 25482556. Its totient is φ = 25159680.

The previous prime is 25321099. The next prime is 25321151. The reversal of 25321117 is 71112352.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8231161 + 17089956 = 2869^2 + 4134^2 .

It is a cyclic number.

It is not a de Polignac number, because 25321117 - 2⁷ = 25320989 is a prime.

It is a super-2 number, since 2×25321117² = 1282317932255378, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25321157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 80484 + ... + 80797.

It is an arithmetic number, because the mean of its divisors is an integer number (6370639).

Almost surely, 2^25321117 is an apocalyptic number.

It is an amenable number.

25321117 is a deficient number, since it is larger than the sum of its proper divisors (161439).

25321117 is a wasteful number, since it uses less digits than its factorization.

25321117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161438.

The product of its digits is 420, while the sum is 22.

The square root of 25321117 is about 5032.0092408500. The cubic root of 25321117 is about 293.6483872478.

Adding to 25321117 its reverse (71112352), we get a palindrome (96433469).

The spelling of 25321117 in words is "twenty-five million, three hundred twenty-one thousand, one hundred seventeen".