25648025 has 24 divisors (see below), whose sum is σ = 34919640. Its totient is φ = 18570240.

The previous prime is 25648009. The next prime is 25648033. The reversal of 25648025 is 52084652.

It can be written as a sum of positive squares in 12 ways, for example, as 12369289 + 13278736 = 3517^2 + 3644^2 .

It is not a de Polignac number, because 25648025 - 2⁴ = 25648009 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 25647982 and 25648000.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16481 + ... + 17969.

It is an arithmetic number, because the mean of its divisors is an integer number (1454985).

Almost surely, 2^25648025 is an apocalyptic number.

25648025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25648025 is a deficient number, since it is larger than the sum of its proper divisors (9271615).

25648025 is a wasteful number, since it uses less digits than its factorization.

25648025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1565 (or 1560 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 32.

The square root of 25648025 is about 5064.3879195812. The cubic root of 25648025 is about 294.9067022785.

It can be divided in two parts, 25 and 648025, that multiplied together give a square (16200625 = 4025²).

The spelling of 25648025 in words is "twenty-five million, six hundred forty-eight thousand, twenty-five".