25444425 has 24 divisors (see below), whose sum is σ = 42497280. Its totient is φ = 13432000.

The previous prime is 25444423. The next prime is 25444429. The reversal of 25444425 is 52444452.

It is not a de Polignac number, because 25444425 - 2¹ = 25444423 is a prime.

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 25444392 and 25444401.

It is not an unprimeable number, because it can be changed into a prime (25444421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5896 + ... + 9254.

It is an arithmetic number, because the mean of its divisors is an integer number (1770720).

Almost surely, 2^25444425 is an apocalyptic number.

25444425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25444425 is a deficient number, since it is larger than the sum of its proper divisors (17052855).

25444425 is a wasteful number, since it uses less digits than its factorization.

25444425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3473 (or 3468 counting only the distinct ones).

The product of its digits is 25600, while the sum is 30.

The square root of 25444425 is about 5044.2467227526. The cubic root of 25444425 is about 294.1242822229.

Adding to 25444425 its reverse (52444452), we get a palindrome (77888877).

The spelling of 25444425 in words is "twenty-five million, four hundred forty-four thousand, four hundred twenty-five".