25918425 has 36 divisors (see below), whose sum is σ = 49999404. Its totient is φ = 12758400.

The previous prime is 25918423. The next prime is 25918433. The reversal of 25918425 is 52481952.

It can be written as a sum of positive squares in 6 ways, for example, as 144 + 25918281 = 12^2 + 5091^2 .

It is not a de Polignac number, because 25918425 - 2¹ = 25918423 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25918425.

It is not an unprimeable number, because it can be changed into a prime (25918423) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1506 + ... + 7355.

Almost surely, 2^25918425 is an apocalyptic number.

25918425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25918425 is a deficient number, since it is larger than the sum of its proper divisors (24080979).

25918425 is a wasteful number, since it uses less digits than its factorization.

25918425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8890 (or 8882 counting only the distinct ones).

The product of its digits is 28800, while the sum is 36.

The square root of 25918425 is about 5091.0141425850. The cubic root of 25918425 is about 295.9394545328.

The spelling of 25918425 in words is "twenty-five million, nine hundred eighteen thousand, four hundred twenty-five".