25671245 has 4 divisors (see below), whose sum is σ = 30805500. Its totient is φ = 20536992.

The previous prime is 25671221. The next prime is 25671263. The reversal of 25671245 is 54217652.

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 9647236 + 16024009 = 3106^2 + 4003^2 .

It is a cyclic number.

It is not a de Polignac number, because 25671245 - 2⁶ = 25671181 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2567120 + ... + 2567129.

It is an arithmetic number, because the mean of its divisors is an integer number (7701375).

Almost surely, 2^25671245 is an apocalyptic number.

It is an amenable number.

25671245 is a deficient number, since it is larger than the sum of its proper divisors (5134255).

25671245 is an equidigital number, since it uses as much as digits as its factorization.

25671245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5134254.

The product of its digits is 16800, while the sum is 32.

The square root of 25671245 is about 5066.6798793687. The cubic root of 25671245 is about 294.9956716783.

Adding to 25671245 its reverse (54217652), we get a palindrome (79888897).

The spelling of 25671245 in words is "twenty-five million, six hundred seventy-one thousand, two hundred forty-five".