25170001 has 4 divisors (see below), whose sum is σ = 25452900. Its totient is φ = 24887104.

The previous prime is 25169993. The next prime is 25170037. The reversal of 25170001 is 10007152.

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 6507601 + 18662400 = 2551^2 + 4320^2 .

It is a cyclic number.

It is not a de Polignac number, because 25170001 - 2³ = 25169993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25170701) 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, 141316 + ... + 141493.

It is an arithmetic number, because the mean of its divisors is an integer number (6363225).

Almost surely, 2^25170001 is an apocalyptic number.

It is an amenable number.

25170001 is a deficient number, since it is larger than the sum of its proper divisors (282899).

25170001 is an equidigital number, since it uses as much as digits as its factorization.

25170001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 282898.

The product of its (nonzero) digits is 70, while the sum is 16.

The square root of 25170001 is about 5016.9712975061. The cubic root of 25170001 is about 293.0630584108.

Adding to 25170001 its reverse (10007152), we get a palindrome (35177153).

The spelling of 25170001 in words is "twenty-five million, one hundred seventy thousand, one".