25170245 has 8 divisors (see below), whose sum is σ = 30284280. Its totient is φ = 20082880.

The previous prime is 25170227. The next prime is 25170263. The reversal of 25170245 is 54207152.

It is an interprime number because it is at equal distance from previous prime (25170227) and next prime (25170263).

It can be written as a sum of positive squares in 4 ways, for example, as 2455489 + 22714756 = 1567^2 + 4766^2 .

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

It is a de Polignac number, because none of the positive numbers 2^k-25170245 is a prime.

It is a congruent number.

It is an unprimeable number.

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, 4526 + ... + 8415.

It is an arithmetic number, because the mean of its divisors is an integer number (3785535).

Almost surely, 2^25170245 is an apocalyptic number.

It is an amenable number.

25170245 is a deficient number, since it is larger than the sum of its proper divisors (5114035).

25170245 is a wasteful number, since it uses less digits than its factorization.

25170245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13335.

The product of its (nonzero) digits is 2800, while the sum is 26.

The square root of 25170245 is about 5016.9956149074. The cubic root of 25170245 is about 293.0640054000.

Adding to 25170245 its reverse (54207152), we get a palindrome (79377397).

The spelling of 25170245 in words is "twenty-five million, one hundred seventy thousand, two hundred forty-five".