25408025 has 12 divisors (see below), whose sum is σ = 32024364. Its totient is φ = 19992000.

The previous prime is 25407983. The next prime is 25408027. The reversal of 25408025 is 52080452.

It can be written as a sum of positive squares in 6 ways, for example, as 4787344 + 20620681 = 2188^2 + 4541^2 .

It is not a de Polignac number, because 25408025 - 2⁶ = 25407961 is a prime.

It is a super-3 number, since 3×25408025³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25407985 and 25408003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25408027) 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 11 ways as a sum of consecutive naturals, for example, 6806 + ... + 9855.

It is an arithmetic number, because the mean of its divisors is an integer number (2668697).

Almost surely, 2^25408025 is an apocalyptic number.

25408025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25408025 is a deficient number, since it is larger than the sum of its proper divisors (6616339).

25408025 is a wasteful number, since it uses less digits than its factorization.

25408025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16732 (or 16727 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 26.

The square root of 25408025 is about 5040.6373604932. The cubic root of 25408025 is about 293.9839602831.

Adding to 25408025 its reverse (52080452), we get a palindrome (77488477).

The spelling of 25408025 in words is "twenty-five million, four hundred eight thousand, twenty-five".