25170017 has 4 divisors (see below), whose sum is σ = 25183380. Its totient is φ = 25156656.

The previous prime is 25169993. The next prime is 25170037. The reversal of 25170017 is 71007152.

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 9928801 + 15241216 = 3151^2 + 3904^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25170017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25169974 and 25170001.

It is not an unprimeable number, because it can be changed into a prime (25170037) 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, 3278 + ... + 7815.

It is an arithmetic number, because the mean of its divisors is an integer number (6295845).

Almost surely, 2^25170017 is an apocalyptic number.

It is an amenable number.

25170017 is a deficient number, since it is larger than the sum of its proper divisors (13363).

25170017 is a wasteful number, since it uses less digits than its factorization.

25170017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13362.

The product of its (nonzero) digits is 490, while the sum is 23.

The square root of 25170017 is about 5016.9728920934. The cubic root of 25170017 is about 293.0631205086.

Adding to 25170017 its reverse (71007152), we get a palindrome (96177169).

The spelling of 25170017 in words is "twenty-five million, one hundred seventy thousand, seventeen".