25670245 has 4 divisors (see below), whose sum is σ = 30804300. Its totient is φ = 20536192.

The previous prime is 25670243. The next prime is 25670287. The reversal of 25670245 is 54207652.

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 18610596 + 7059649 = 4314^2 + 2657^2 .

It is a cyclic number.

It is not a de Polignac number, because 25670245 - 2¹ = 25670243 is a prime.

It is a super-2 number, since 2×25670245² = 1317922956720050, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25670243) 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, 2567020 + ... + 2567029.

It is an arithmetic number, because the mean of its divisors is an integer number (7701075).

Almost surely, 2^25670245 is an apocalyptic number.

It is an amenable number.

25670245 is a deficient number, since it is larger than the sum of its proper divisors (5134055).

25670245 is an equidigital number, since it uses as much as digits as its factorization.

25670245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5134054.

The product of its (nonzero) digits is 16800, while the sum is 31.

The square root of 25670245 is about 5066.5811944545. The cubic root of 25670245 is about 294.9918411992.

Adding to 25670245 its reverse (54207652), we get a palindrome (79877897).

The spelling of 25670245 in words is "twenty-five million, six hundred seventy thousand, two hundred forty-five".