25631025 has 24 divisors (see below), whose sum is σ = 48431424. Its totient is φ = 11716800.

The previous prime is 25630991. The next prime is 25631029. The reversal of 25631025 is 52013652.

It is not a de Polignac number, because 25631025 - 2⁶ = 25630961 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 25630986 and 25631004.

It is not an unprimeable number, because it can be changed into a prime (25631029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 23886 + ... + 24935.

It is an arithmetic number, because the mean of its divisors is an integer number (2017976).

Almost surely, 2^25631025 is an apocalyptic number.

25631025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25631025 is a deficient number, since it is larger than the sum of its proper divisors (22800399).

25631025 is a wasteful number, since it uses less digits than its factorization.

25631025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48841 (or 48836 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 25631025 is about 5062.7092549346. The cubic root of 25631025 is about 294.8415312824.

Adding to 25631025 its reverse (52013652), we get a palindrome (77644677).

The spelling of 25631025 in words is "twenty-five million, six hundred thirty-one thousand, twenty-five".