25531245 has 48 divisors (see below), whose sum is σ = 45961344. Its totient is φ = 13104000.

The previous prime is 25531241. The next prime is 25531249. The reversal of 25531245 is 54213552.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (25531241) and next prime (25531249).

It is not a de Polignac number, because 25531245 - 2² = 25531241 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25531241) 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 47 ways as a sum of consecutive naturals, for example, 194830 + ... + 194960.

It is an arithmetic number, because the mean of its divisors is an integer number (957528).

Almost surely, 2^25531245 is an apocalyptic number.

It is an amenable number.

25531245 is a deficient number, since it is larger than the sum of its proper divisors (20430099).

25531245 is a wasteful number, since it uses less digits than its factorization.

25531245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 274 (or 271 counting only the distinct ones).

The product of its digits is 6000, while the sum is 27.

The square root of 25531245 is about 5052.8452380812. The cubic root of 25531245 is about 294.4584337591.

Adding to 25531245 its reverse (54213552), we get a palindrome (79744797).

The spelling of 25531245 in words is "twenty-five million, five hundred thirty-one thousand, two hundred forty-five".