25600625 has 10 divisors (see below), whose sum is σ = 31991322. Its totient is φ = 20480000.

The previous prime is 25600621. The next prime is 25600639. The reversal of 25600625 is 52600652.

It is a happy number.

It can be written as a sum of positive squares in 5 ways, for example, as 4596736 + 21003889 = 2144^2 + 4583^2 .

It is not a de Polignac number, because 25600625 - 2² = 25600621 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25600594 and 25600603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25600621) 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 9 ways as a sum of consecutive naturals, for example, 19856 + ... + 21105.

Almost surely, 2^25600625 is an apocalyptic number.

25600625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25600625 is a deficient number, since it is larger than the sum of its proper divisors (6390697).

25600625 is an frugal number, since it uses more digits than its factorization.

25600625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40981 (or 40966 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 25600625 is about 5059.7060191280. The cubic root of 25600625 is about 294.7249183297.

It can be divided in two parts, 25600 and 625, that multiplied together give a square (16000000 = 4000²).

The spelling of 25600625 in words is "twenty-five million, six hundred thousand, six hundred twenty-five".