25505025 has 96 divisors (see below), whose sum is σ = 53829888. Its totient is φ = 10368000.

The previous prime is 25505023. The next prime is 25505027. The reversal of 25505025 is 52050552.

It is an interprime number because it is at equal distance from previous prime (25505023) and next prime (25505027).

It is not a de Polignac number, because 25505025 - 2¹ = 25505023 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 25504986 and 25505004.

It is not an unprimeable number, because it can be changed into a prime (25505021) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 252475 + ... + 252575.

It is an arithmetic number, because the mean of its divisors is an integer number (560728).

Almost surely, 2^25505025 is an apocalyptic number.

25505025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25505025 is an abundant number, since it is smaller than the sum of its proper divisors (28324863).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25505025 is a wasteful number, since it uses less digits than its factorization.

25505025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171 (or 166 counting only the distinct ones).

The product of its (nonzero) digits is 2500, while the sum is 24.

The square root of 25505025 is about 5050.2499938122. The cubic root of 25505025 is about 294.3575985585.

Adding to 25505025 its reverse (52050552), we get a palindrome (77555577).

The spelling of 25505025 in words is "twenty-five million, five hundred five thousand, twenty-five".